20486908

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 40642560

約数和(自身を除く): 20155652

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 71, 124, 142, 179, 284, 358, 403, 716, 806, 923, 1612, 1846, 2201, 2327, 3692, 4402, 4654, 5549, 8804, 9308, 11098, 12709, 22196, 25418, 28613, 50836, 57226, 72137, 114452, 144274, 165217, 288548, 330434, 393979, 660868, 787958, 1575916, 5121727, 10243454, 20486908]

約数ペア:

[(1, 20486908), (2, 10243454), (4, 5121727), (13, 1575916), (26, 787958), (31, 660868), (52, 393979), (62, 330434), (71, 288548), (124, 165217), (142, 144274), (179, 114452), (284, 72137), (358, 57226), (403, 50836), (716, 28613), (806, 25418), (923, 22196), (1612, 12709), (1846, 11098), (2201, 9308), (2327, 8804), (3692, 5549), (4402, 4654)]