21163740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{631}}^1$

素因数の和:699

約数の個数: 96

約数和(自身を含む): 65404416

約数和(自身を除く): 44240676

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 43, 52, 60, 65, 78, 86, 129, 130, 156, 172, 195, 215, 258, 260, 390, 430, 516, 559, 631, 645, 780, 860, 1118, 1262, 1290, 1677, 1893, 2236, 2524, 2580, 2795, 3155, 3354, 3786, 5590, 6310, 6708, 7572, 8203, 8385, 9465, 11180, 12620, 16406, 16770, 18930, 24609, 27133, 32812, 33540, 37860, 41015, 49218, 54266, 81399, 82030, 98436, 108532, 123045, 135665, 162798, 164060, 246090, 271330, 325596, 352729, 406995, 492180, 542660, 705458, 813990, 1058187, 1410916, 1627980, 1763645, 2116374, 3527290, 4232748, 5290935, 7054580, 10581870, 21163740]

約数ペア:

[(1, 21163740), (2, 10581870), (3, 7054580), (4, 5290935), (5, 4232748), (6, 3527290), (10, 2116374), (12, 1763645), (13, 1627980), (15, 1410916), (20, 1058187), (26, 813990), (30, 705458), (39, 542660), (43, 492180), (52, 406995), (60, 352729), (65, 325596), (78, 271330), (86, 246090), (129, 164060), (130, 162798), (156, 135665), (172, 123045), (195, 108532), (215, 98436), (258, 82030), (260, 81399), (390, 54266), (430, 49218), (516, 41015), (559, 37860), (631, 33540), (645, 32812), (780, 27133), (860, 24609), (1118, 18930), (1262, 16770), (1290, 16406), (1677, 12620), (1893, 11180), (2236, 9465), (2524, 8385), (2580, 8203), (2795, 7572), (3155, 6708), (3354, 6310), (3786, 5590)]