21486736

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{191}}^1$

素因数の和:367

約数の個数: 40

約数和(自身を含む): 42854400

約数和(自身を除く): 21367664

約数列:

[1, 2, 4, 8, 16, 79, 89, 158, 178, 191, 316, 356, 382, 632, 712, 764, 1264, 1424, 1528, 3056, 7031, 14062, 15089, 16999, 28124, 30178, 33998, 56248, 60356, 67996, 112496, 120712, 135992, 241424, 271984, 1342921, 2685842, 5371684, 10743368, 21486736]

約数ペア:

[(1, 21486736), (2, 10743368), (4, 5371684), (8, 2685842), (16, 1342921), (79, 271984), (89, 241424), (158, 135992), (178, 120712), (191, 112496), (316, 67996), (356, 60356), (382, 56248), (632, 33998), (712, 30178), (764, 28124), (1264, 16999), (1424, 15089), (1528, 14062), (3056, 7031)]