990571520

素因数分解:

$2^{10}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^2$

素因数の和:214

約数の個数: 132

約数和(自身を含む): 2484304704

約数和(自身を除く): 1493733184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 79, 80, 124, 128, 155, 158, 160, 248, 256, 310, 316, 320, 395, 496, 512, 620, 632, 640, 790, 992, 1024, 1240, 1264, 1280, 1580, 1984, 2449, 2480, 2528, 2560, 3160, 3968, 4898, 4960, 5056, 5120, 6241, 6320, 7936, 9796, 9920, 10112, 12245, 12482, 12640, 15872, 19592, 19840, 20224, 24490, 24964, 25280, 31205, 31744, 39184, 39680, 40448, 48980, 49928, 50560, 62410, 78368, 79360, 80896, 97960, 99856, 101120, 124820, 156736, 158720, 193471, 195920, 199712, 202240, 249640, 313472, 386942, 391840, 399424, 404480, 499280, 626944, 773884, 783680, 798848, 967355, 998560, 1253888, 1547768, 1567360, 1597696, 1934710, 1997120, 2507776, 3095536, 3134720, 3195392, 3869420, 3994240, 6191072, 6269440, 6390784, 7738840, 7988480, 12382144, 12538880, 15477680, 15976960, 24764288, 30955360, 31953920, 49528576, 61910720, 99057152, 123821440, 198114304, 247642880, 495285760, 990571520]

約数ペア:

[(1, 990571520), (2, 495285760), (4, 247642880), (5, 198114304), (8, 123821440), (10, 99057152), (16, 61910720), (20, 49528576), (31, 31953920), (32, 30955360), (40, 24764288), (62, 15976960), (64, 15477680), (79, 12538880), (80, 12382144), (124, 7988480), (128, 7738840), (155, 6390784), (158, 6269440), (160, 6191072), (248, 3994240), (256, 3869420), (310, 3195392), (316, 3134720), (320, 3095536), (395, 2507776), (496, 1997120), (512, 1934710), (620, 1597696), (632, 1567360), (640, 1547768), (790, 1253888), (992, 998560), (1024, 967355), (1240, 798848), (1264, 783680), (1280, 773884), (1580, 626944), (1984, 499280), (2449, 404480), (2480, 399424), (2528, 391840), (2560, 386942), (3160, 313472), (3968, 249640), (4898, 202240), (4960, 199712), (5056, 195920), (5120, 193471), (6241, 158720), (6320, 156736), (7936, 124820), (9796, 101120), (9920, 99856), (10112, 97960), (12245, 80896), (12482, 79360), (12640, 78368), (15872, 62410), (19592, 50560), (19840, 49928), (20224, 48980), (24490, 40448), (24964, 39680), (25280, 39184), (31205, 31744)]