21295920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{997}}^1$

素因数の和:1102

約数の個数: 80

約数和(自身を含む): 66826080

約数和(自身を除く): 45530160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 89, 120, 178, 240, 267, 356, 445, 534, 712, 890, 997, 1068, 1335, 1424, 1780, 1994, 2136, 2670, 2991, 3560, 3988, 4272, 4985, 5340, 5982, 7120, 7976, 9970, 10680, 11964, 14955, 15952, 19940, 21360, 23928, 29910, 39880, 47856, 59820, 79760, 88733, 119640, 177466, 239280, 266199, 354932, 443665, 532398, 709864, 887330, 1064796, 1330995, 1419728, 1774660, 2129592, 2661990, 3549320, 4259184, 5323980, 7098640, 10647960, 21295920]

約数ペア:

[(1, 21295920), (2, 10647960), (3, 7098640), (4, 5323980), (5, 4259184), (6, 3549320), (8, 2661990), (10, 2129592), (12, 1774660), (15, 1419728), (16, 1330995), (20, 1064796), (24, 887330), (30, 709864), (40, 532398), (48, 443665), (60, 354932), (80, 266199), (89, 239280), (120, 177466), (178, 119640), (240, 88733), (267, 79760), (356, 59820), (445, 47856), (534, 39880), (712, 29910), (890, 23928), (997, 21360), (1068, 19940), (1335, 15952), (1424, 14955), (1780, 11964), (1994, 10680), (2136, 9970), (2670, 7976), (2991, 7120), (3560, 5982), (3988, 5340), (4272, 4985)]