21256300

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:307

約数の個数: 72

約数和(自身を含む): 50528016

約数和(自身を除く): 29271716

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 83, 100, 130, 166, 197, 260, 325, 332, 394, 415, 650, 788, 830, 985, 1079, 1300, 1660, 1970, 2075, 2158, 2561, 3940, 4150, 4316, 4925, 5122, 5395, 8300, 9850, 10244, 10790, 12805, 16351, 19700, 21580, 25610, 26975, 32702, 51220, 53950, 64025, 65404, 81755, 107900, 128050, 163510, 212563, 256100, 327020, 408775, 425126, 817550, 850252, 1062815, 1635100, 2125630, 4251260, 5314075, 10628150, 21256300]

約数ペア:

[(1, 21256300), (2, 10628150), (4, 5314075), (5, 4251260), (10, 2125630), (13, 1635100), (20, 1062815), (25, 850252), (26, 817550), (50, 425126), (52, 408775), (65, 327020), (83, 256100), (100, 212563), (130, 163510), (166, 128050), (197, 107900), (260, 81755), (325, 65404), (332, 64025), (394, 53950), (415, 51220), (650, 32702), (788, 26975), (830, 25610), (985, 21580), (1079, 19700), (1300, 16351), (1660, 12805), (1970, 10790), (2075, 10244), (2158, 9850), (2561, 8300), (3940, 5395), (4150, 5122), (4316, 4925)]