20509174

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:217

約数の個数: 48

約数和(自身を含む): 38637792

約数和(自身を除く): 18128618

約数列:

[1, 2, 7, 14, 17, 34, 37, 74, 119, 137, 238, 259, 274, 289, 518, 578, 629, 959, 1258, 1918, 2023, 2329, 4046, 4403, 4658, 5069, 8806, 10138, 10693, 16303, 21386, 32606, 35483, 39593, 70966, 74851, 79186, 86173, 149702, 172346, 277151, 554302, 603211, 1206422, 1464941, 2929882, 10254587, 20509174]

約数ペア:

[(1, 20509174), (2, 10254587), (7, 2929882), (14, 1464941), (17, 1206422), (34, 603211), (37, 554302), (74, 277151), (119, 172346), (137, 149702), (238, 86173), (259, 79186), (274, 74851), (289, 70966), (518, 39593), (578, 35483), (629, 32606), (959, 21386), (1258, 16303), (1918, 10693), (2023, 10138), (2329, 8806), (4046, 5069), (4403, 4658)]