21679816

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{421}}^1$

素因数の和:625

約数の個数: 32

約数和(自身を含む): 42005880

約数和(自身を除く): 20326064

約数列:

[1, 2, 4, 8, 41, 82, 157, 164, 314, 328, 421, 628, 842, 1256, 1684, 3368, 6437, 12874, 17261, 25748, 34522, 51496, 66097, 69044, 132194, 138088, 264388, 528776, 2709977, 5419954, 10839908, 21679816]

約数ペア:

[(1, 21679816), (2, 10839908), (4, 5419954), (8, 2709977), (41, 528776), (82, 264388), (157, 138088), (164, 132194), (314, 69044), (328, 66097), (421, 51496), (628, 34522), (842, 25748), (1256, 17261), (1684, 12874), (3368, 6437)]