21115250

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:192

約数の個数: 64

約数和(自身を含む): 43636320

約数和(自身を除く): 22521070

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 73, 89, 125, 130, 146, 178, 250, 325, 365, 445, 650, 730, 890, 949, 1157, 1625, 1825, 1898, 2225, 2314, 3250, 3650, 4450, 4745, 5785, 6497, 9125, 9490, 11125, 11570, 12994, 18250, 22250, 23725, 28925, 32485, 47450, 57850, 64970, 84461, 118625, 144625, 162425, 168922, 237250, 289250, 324850, 422305, 812125, 844610, 1624250, 2111525, 4223050, 10557625, 21115250]

約数ペア:

[(1, 21115250), (2, 10557625), (5, 4223050), (10, 2111525), (13, 1624250), (25, 844610), (26, 812125), (50, 422305), (65, 324850), (73, 289250), (89, 237250), (125, 168922), (130, 162425), (146, 144625), (178, 118625), (250, 84461), (325, 64970), (365, 57850), (445, 47450), (650, 32485), (730, 28925), (890, 23725), (949, 22250), (1157, 18250), (1625, 12994), (1825, 11570), (1898, 11125), (2225, 9490), (2314, 9125), (3250, 6497), (3650, 5785), (4450, 4745)]