20511920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{163}}^1$

素因数の和:211

約数の個数: 120

約数和(自身を含む): 56798448

約数和(自身を除く): 36286528

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 40, 44, 52, 55, 65, 80, 88, 104, 110, 121, 130, 143, 163, 176, 208, 220, 242, 260, 286, 326, 440, 484, 520, 572, 605, 652, 715, 815, 880, 968, 1040, 1144, 1210, 1304, 1430, 1573, 1630, 1793, 1936, 2119, 2288, 2420, 2608, 2860, 3146, 3260, 3586, 4238, 4840, 5720, 6292, 6520, 7172, 7865, 8476, 8965, 9680, 10595, 11440, 12584, 13040, 14344, 15730, 16952, 17930, 19723, 21190, 23309, 25168, 28688, 31460, 33904, 35860, 39446, 42380, 46618, 62920, 71720, 78892, 84760, 93236, 98615, 116545, 125840, 143440, 157784, 169520, 186472, 197230, 233090, 256399, 315568, 372944, 394460, 466180, 512798, 788920, 932360, 1025596, 1281995, 1577840, 1864720, 2051192, 2563990, 4102384, 5127980, 10255960, 20511920]

約数ペア:

[(1, 20511920), (2, 10255960), (4, 5127980), (5, 4102384), (8, 2563990), (10, 2051192), (11, 1864720), (13, 1577840), (16, 1281995), (20, 1025596), (22, 932360), (26, 788920), (40, 512798), (44, 466180), (52, 394460), (55, 372944), (65, 315568), (80, 256399), (88, 233090), (104, 197230), (110, 186472), (121, 169520), (130, 157784), (143, 143440), (163, 125840), (176, 116545), (208, 98615), (220, 93236), (242, 84760), (260, 78892), (286, 71720), (326, 62920), (440, 46618), (484, 42380), (520, 39446), (572, 35860), (605, 33904), (652, 31460), (715, 28688), (815, 25168), (880, 23309), (968, 21190), (1040, 19723), (1144, 17930), (1210, 16952), (1304, 15730), (1430, 14344), (1573, 13040), (1630, 12584), (1793, 11440), (1936, 10595), (2119, 9680), (2288, 8965), (2420, 8476), (2608, 7865), (2860, 7172), (3146, 6520), (3260, 6292), (3586, 5720), (4238, 4840)]