644875520

素因数分解:

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

素因数の和:4115

約数の個数: 72

約数和(自身を含む): 1557233664

約数和(自身を除く): 912358144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 256, 320, 508, 635, 640, 1016, 1270, 1280, 2032, 2540, 3967, 4064, 5080, 7934, 8128, 10160, 15868, 16256, 19835, 20320, 31736, 32512, 39670, 40640, 63472, 79340, 81280, 126944, 158680, 162560, 253888, 317360, 503809, 507776, 634720, 1007618, 1015552, 1269440, 2015236, 2519045, 2538880, 4030472, 5038090, 5077760, 8060944, 10076180, 16121888, 20152360, 32243776, 40304720, 64487552, 80609440, 128975104, 161218880, 322437760, 644875520]

約数ペア:

[(1, 644875520), (2, 322437760), (4, 161218880), (5, 128975104), (8, 80609440), (10, 64487552), (16, 40304720), (20, 32243776), (32, 20152360), (40, 16121888), (64, 10076180), (80, 8060944), (127, 5077760), (128, 5038090), (160, 4030472), (254, 2538880), (256, 2519045), (320, 2015236), (508, 1269440), (635, 1015552), (640, 1007618), (1016, 634720), (1270, 507776), (1280, 503809), (2032, 317360), (2540, 253888), (3967, 162560), (4064, 158680), (5080, 126944), (7934, 81280), (8128, 79340), (10160, 63472), (15868, 40640), (16256, 39670), (19835, 32512), (20320, 31736)]