20951684

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{173}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 42357168

約数和(自身を除く): 21405484

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 137, 173, 221, 274, 346, 442, 548, 692, 884, 1781, 2249, 2329, 2941, 3562, 4498, 4658, 5882, 7124, 8996, 9316, 11764, 23701, 30277, 38233, 47402, 60554, 76466, 94804, 121108, 152932, 308113, 402917, 616226, 805834, 1232452, 1611668, 5237921, 10475842, 20951684]

約数ペア:

[(1, 20951684), (2, 10475842), (4, 5237921), (13, 1611668), (17, 1232452), (26, 805834), (34, 616226), (52, 402917), (68, 308113), (137, 152932), (173, 121108), (221, 94804), (274, 76466), (346, 60554), (442, 47402), (548, 38233), (692, 30277), (884, 23701), (1781, 11764), (2249, 9316), (2329, 8996), (2941, 7124), (3562, 5882), (4498, 4658)]