21415940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{41}}^2$

素因数の和:118

約数の個数: 108

約数和(自身を含む): 57748068

約数和(自身を除く): 36332128

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 41, 49, 52, 65, 70, 82, 91, 98, 130, 140, 164, 182, 196, 205, 245, 260, 287, 364, 410, 455, 490, 533, 574, 637, 820, 910, 980, 1066, 1148, 1274, 1435, 1681, 1820, 2009, 2132, 2548, 2665, 2870, 3185, 3362, 3731, 4018, 5330, 5740, 6370, 6724, 7462, 8036, 8405, 10045, 10660, 11767, 12740, 14924, 16810, 18655, 20090, 21853, 23534, 26117, 33620, 37310, 40180, 43706, 47068, 52234, 58835, 74620, 82369, 87412, 104468, 109265, 117670, 130585, 152971, 164738, 218530, 235340, 261170, 305942, 329476, 411845, 437060, 522340, 611884, 764855, 823690, 1070797, 1529710, 1647380, 2141594, 3059420, 4283188, 5353985, 10707970, 21415940]

約数ペア:

[(1, 21415940), (2, 10707970), (4, 5353985), (5, 4283188), (7, 3059420), (10, 2141594), (13, 1647380), (14, 1529710), (20, 1070797), (26, 823690), (28, 764855), (35, 611884), (41, 522340), (49, 437060), (52, 411845), (65, 329476), (70, 305942), (82, 261170), (91, 235340), (98, 218530), (130, 164738), (140, 152971), (164, 130585), (182, 117670), (196, 109265), (205, 104468), (245, 87412), (260, 82369), (287, 74620), (364, 58835), (410, 52234), (455, 47068), (490, 43706), (533, 40180), (574, 37310), (637, 33620), (820, 26117), (910, 23534), (980, 21853), (1066, 20090), (1148, 18655), (1274, 16810), (1435, 14924), (1681, 12740), (1820, 11767), (2009, 10660), (2132, 10045), (2548, 8405), (2665, 8036), (2870, 7462), (3185, 6724), (3362, 6370), (3731, 5740), (4018, 5330)]