21151920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2843}}^1$

素因数の和:2890

約数の個数: 80

約数和(自身を含む): 67709952

約数和(自身を除く): 46558032

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 31, 40, 48, 60, 62, 80, 93, 120, 124, 155, 186, 240, 248, 310, 372, 465, 496, 620, 744, 930, 1240, 1488, 1860, 2480, 2843, 3720, 5686, 7440, 8529, 11372, 14215, 17058, 22744, 28430, 34116, 42645, 45488, 56860, 68232, 85290, 88133, 113720, 136464, 170580, 176266, 227440, 264399, 341160, 352532, 440665, 528798, 682320, 705064, 881330, 1057596, 1321995, 1410128, 1762660, 2115192, 2643990, 3525320, 4230384, 5287980, 7050640, 10575960, 21151920]

約数ペア:

[(1, 21151920), (2, 10575960), (3, 7050640), (4, 5287980), (5, 4230384), (6, 3525320), (8, 2643990), (10, 2115192), (12, 1762660), (15, 1410128), (16, 1321995), (20, 1057596), (24, 881330), (30, 705064), (31, 682320), (40, 528798), (48, 440665), (60, 352532), (62, 341160), (80, 264399), (93, 227440), (120, 176266), (124, 170580), (155, 136464), (186, 113720), (240, 88133), (248, 85290), (310, 68232), (372, 56860), (465, 45488), (496, 42645), (620, 34116), (744, 28430), (930, 22744), (1240, 17058), (1488, 14215), (1860, 11372), (2480, 8529), (2843, 7440), (3720, 5686)]