19991141120

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{3967}}^1$

素因数の和:4146

約数の個数: 144

約数和(自身を含む): 49831477248

約数和(自身を除く): 29840336128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 127, 128, 155, 160, 248, 254, 256, 310, 320, 496, 508, 620, 635, 640, 992, 1016, 1240, 1270, 1280, 1984, 2032, 2480, 2540, 3937, 3967, 3968, 4064, 4960, 5080, 7874, 7934, 7936, 8128, 9920, 10160, 15748, 15868, 16256, 19685, 19835, 19840, 20320, 31496, 31736, 32512, 39370, 39670, 39680, 40640, 62992, 63472, 78740, 79340, 81280, 122977, 125984, 126944, 157480, 158680, 162560, 245954, 251968, 253888, 314960, 317360, 491908, 503809, 503936, 507776, 614885, 629920, 634720, 983816, 1007618, 1007872, 1015552, 1229770, 1259840, 1269440, 1967632, 2015236, 2459540, 2519045, 2519680, 2538880, 3935264, 4030472, 4919080, 5038090, 5039360, 5077760, 7870528, 8060944, 9838160, 10076180, 15618079, 15741056, 16121888, 19676320, 20152360, 31236158, 31482112, 32243776, 39352640, 40304720, 62472316, 64487552, 78090395, 78705280, 80609440, 124944632, 128975104, 156180790, 157410560, 161218880, 249889264, 312361580, 322437760, 499778528, 624723160, 644875520, 999557056, 1249446320, 1999114112, 2498892640, 3998228224, 4997785280, 9995570560, 19991141120]

約数ペア:

[(1, 19991141120), (2, 9995570560), (4, 4997785280), (5, 3998228224), (8, 2498892640), (10, 1999114112), (16, 1249446320), (20, 999557056), (31, 644875520), (32, 624723160), (40, 499778528), (62, 322437760), (64, 312361580), (80, 249889264), (124, 161218880), (127, 157410560), (128, 156180790), (155, 128975104), (160, 124944632), (248, 80609440), (254, 78705280), (256, 78090395), (310, 64487552), (320, 62472316), (496, 40304720), (508, 39352640), (620, 32243776), (635, 31482112), (640, 31236158), (992, 20152360), (1016, 19676320), (1240, 16121888), (1270, 15741056), (1280, 15618079), (1984, 10076180), (2032, 9838160), (2480, 8060944), (2540, 7870528), (3937, 5077760), (3967, 5039360), (3968, 5038090), (4064, 4919080), (4960, 4030472), (5080, 3935264), (7874, 2538880), (7934, 2519680), (7936, 2519045), (8128, 2459540), (9920, 2015236), (10160, 1967632), (15748, 1269440), (15868, 1259840), (16256, 1229770), (19685, 1015552), (19835, 1007872), (19840, 1007618), (20320, 983816), (31496, 634720), (31736, 629920), (32512, 614885), (39370, 507776), (39670, 503936), (39680, 503809), (40640, 491908), (62992, 317360), (63472, 314960), (78740, 253888), (79340, 251968), (81280, 245954), (122977, 162560), (125984, 158680), (126944, 157480)]