20481848

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{47}}^2\times {\mathrm{61}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 41980200

約数和(自身を除く): 21498352

約数列:

[1, 2, 4, 8, 19, 38, 47, 61, 76, 94, 122, 152, 188, 244, 376, 488, 893, 1159, 1786, 2209, 2318, 2867, 3572, 4418, 4636, 5734, 7144, 8836, 9272, 11468, 17672, 22936, 41971, 54473, 83942, 108946, 134749, 167884, 217892, 269498, 335768, 435784, 538996, 1077992, 2560231, 5120462, 10240924, 20481848]

約数ペア:

[(1, 20481848), (2, 10240924), (4, 5120462), (8, 2560231), (19, 1077992), (38, 538996), (47, 435784), (61, 335768), (76, 269498), (94, 217892), (122, 167884), (152, 134749), (188, 108946), (244, 83942), (376, 54473), (488, 41971), (893, 22936), (1159, 17672), (1786, 11468), (2209, 9272), (2318, 8836), (2867, 7144), (3572, 5734), (4418, 4636)]