21278790

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1399}}^1$

素因数の和:1438

約数の個数: 72

約数和(自身を含む): 59950800

約数和(自身を除く): 38672010

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 39, 45, 65, 78, 90, 117, 130, 169, 195, 234, 338, 390, 507, 585, 845, 1014, 1170, 1399, 1521, 1690, 2535, 2798, 3042, 4197, 5070, 6995, 7605, 8394, 12591, 13990, 15210, 18187, 20985, 25182, 36374, 41970, 54561, 62955, 90935, 109122, 125910, 163683, 181870, 236431, 272805, 327366, 472862, 545610, 709293, 818415, 1182155, 1418586, 1636830, 2127879, 2364310, 3546465, 4255758, 7092930, 10639395, 21278790]

約数ペア:

[(1, 21278790), (2, 10639395), (3, 7092930), (5, 4255758), (6, 3546465), (9, 2364310), (10, 2127879), (13, 1636830), (15, 1418586), (18, 1182155), (26, 818415), (30, 709293), (39, 545610), (45, 472862), (65, 327366), (78, 272805), (90, 236431), (117, 181870), (130, 163683), (169, 125910), (195, 109122), (234, 90935), (338, 62955), (390, 54561), (507, 41970), (585, 36374), (845, 25182), (1014, 20985), (1170, 18187), (1399, 15210), (1521, 13990), (1690, 12591), (2535, 8394), (2798, 7605), (3042, 6995), (4197, 5070)]