20002180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:169

約数の個数: 96

約数和(自身を含む): 49351680

約数和(自身を除く): 29349500

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 59, 67, 92, 110, 115, 118, 134, 220, 230, 236, 253, 268, 295, 335, 460, 506, 590, 649, 670, 737, 1012, 1180, 1265, 1298, 1340, 1357, 1474, 1541, 2530, 2596, 2714, 2948, 3082, 3245, 3685, 3953, 5060, 5428, 6164, 6490, 6785, 7370, 7705, 7906, 12980, 13570, 14740, 14927, 15410, 15812, 16951, 19765, 27140, 29854, 30820, 33902, 39530, 43483, 59708, 67804, 74635, 79060, 84755, 86966, 90919, 149270, 169510, 173932, 181838, 217415, 298540, 339020, 363676, 434830, 454595, 869660, 909190, 1000109, 1818380, 2000218, 4000436, 5000545, 10001090, 20002180]

約数ペア:

[(1, 20002180), (2, 10001090), (4, 5000545), (5, 4000436), (10, 2000218), (11, 1818380), (20, 1000109), (22, 909190), (23, 869660), (44, 454595), (46, 434830), (55, 363676), (59, 339020), (67, 298540), (92, 217415), (110, 181838), (115, 173932), (118, 169510), (134, 149270), (220, 90919), (230, 86966), (236, 84755), (253, 79060), (268, 74635), (295, 67804), (335, 59708), (460, 43483), (506, 39530), (590, 33902), (649, 30820), (670, 29854), (737, 27140), (1012, 19765), (1180, 16951), (1265, 15812), (1298, 15410), (1340, 14927), (1357, 14740), (1474, 13570), (1541, 12980), (2530, 7906), (2596, 7705), (2714, 7370), (2948, 6785), (3082, 6490), (3245, 6164), (3685, 5428), (3953, 5060)]