21122704

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{983}}^1$

素因数の和:1087

約数の個数: 40

約数和(自身を含む): 43925760

約数和(自身を除く): 22803056

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 79, 136, 158, 272, 316, 632, 983, 1264, 1343, 1966, 2686, 3932, 5372, 7864, 10744, 15728, 16711, 21488, 33422, 66844, 77657, 133688, 155314, 267376, 310628, 621256, 1242512, 1320169, 2640338, 5280676, 10561352, 21122704]

約数ペア:

[(1, 21122704), (2, 10561352), (4, 5280676), (8, 2640338), (16, 1320169), (17, 1242512), (34, 621256), (68, 310628), (79, 267376), (136, 155314), (158, 133688), (272, 77657), (316, 66844), (632, 33422), (983, 21488), (1264, 16711), (1343, 15728), (1966, 10744), (2686, 7864), (3932, 5372)]