20873540

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 45771264

約数和(自身を除く): 24897724

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 131, 155, 257, 262, 310, 514, 524, 620, 655, 1028, 1285, 1310, 2570, 2620, 4061, 5140, 7967, 8122, 15934, 16244, 20305, 31868, 33667, 39835, 40610, 67334, 79670, 81220, 134668, 159340, 168335, 336670, 673340, 1043677, 2087354, 4174708, 5218385, 10436770, 20873540]

約数ペア:

[(1, 20873540), (2, 10436770), (4, 5218385), (5, 4174708), (10, 2087354), (20, 1043677), (31, 673340), (62, 336670), (124, 168335), (131, 159340), (155, 134668), (257, 81220), (262, 79670), (310, 67334), (514, 40610), (524, 39835), (620, 33667), (655, 31868), (1028, 20305), (1285, 16244), (1310, 15934), (2570, 8122), (2620, 7967), (4061, 5140)]