27990820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{9787}}^1$

素因数の和:9820

約数の個数: 48

約数和(自身を含む): 69064128

約数和(自身を除く): 41073308

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 9787, 19574, 39148, 48935, 97870, 107657, 127231, 195740, 215314, 254462, 430628, 508924, 538285, 636155, 1076570, 1272310, 1399541, 2153140, 2544620, 2799082, 5598164, 6997705, 13995410, 27990820]

約数ペア:

[(1, 27990820), (2, 13995410), (4, 6997705), (5, 5598164), (10, 2799082), (11, 2544620), (13, 2153140), (20, 1399541), (22, 1272310), (26, 1076570), (44, 636155), (52, 538285), (55, 508924), (65, 430628), (110, 254462), (130, 215314), (143, 195740), (220, 127231), (260, 107657), (286, 97870), (572, 48935), (715, 39148), (1430, 19574), (2860, 9787)]