21131446220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{487}}^1\times {\mathrm{1283}}^1$

素因数の和:1887

約数の個数: 96

約数和(自身を含む): 47370355200

約数和(自身を除く): 26238908980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 89, 95, 178, 190, 356, 380, 445, 487, 890, 974, 1283, 1691, 1780, 1948, 2435, 2566, 3382, 4870, 5132, 6415, 6764, 8455, 9253, 9740, 12830, 16910, 18506, 24377, 25660, 33820, 37012, 43343, 46265, 48754, 86686, 92530, 97508, 114187, 121885, 173372, 185060, 216715, 228374, 243770, 433430, 456748, 487540, 570935, 624821, 823517, 866860, 1141870, 1249642, 1647034, 2169553, 2283740, 2499284, 3124105, 3294068, 4117585, 4339106, 6248210, 8235170, 8678212, 10847765, 11871599, 12496420, 16470340, 21695530, 23743198, 43391060, 47486396, 55609069, 59357995, 111218138, 118715990, 222436276, 237431980, 278045345, 556090690, 1056572311, 1112181380, 2113144622, 4226289244, 5282861555, 10565723110, 21131446220]

約数ペア:

[(1, 21131446220), (2, 10565723110), (4, 5282861555), (5, 4226289244), (10, 2113144622), (19, 1112181380), (20, 1056572311), (38, 556090690), (76, 278045345), (89, 237431980), (95, 222436276), (178, 118715990), (190, 111218138), (356, 59357995), (380, 55609069), (445, 47486396), (487, 43391060), (890, 23743198), (974, 21695530), (1283, 16470340), (1691, 12496420), (1780, 11871599), (1948, 10847765), (2435, 8678212), (2566, 8235170), (3382, 6248210), (4870, 4339106), (5132, 4117585), (6415, 3294068), (6764, 3124105), (8455, 2499284), (9253, 2283740), (9740, 2169553), (12830, 1647034), (16910, 1249642), (18506, 1141870), (24377, 866860), (25660, 823517), (33820, 624821), (37012, 570935), (43343, 487540), (46265, 456748), (48754, 433430), (86686, 243770), (92530, 228374), (97508, 216715), (114187, 185060), (121885, 173372)]