19815728

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1$

素因数の和:405

約数の個数: 40

約数和(自身を含む): 39670080

約数和(自身を除く): 19854352

約数列:

[1, 2, 4, 8, 16, 61, 79, 122, 158, 244, 257, 316, 488, 514, 632, 976, 1028, 1264, 2056, 4112, 4819, 9638, 15677, 19276, 20303, 31354, 38552, 40606, 62708, 77104, 81212, 125416, 162424, 250832, 324848, 1238483, 2476966, 4953932, 9907864, 19815728]

約数ペア:

[(1, 19815728), (2, 9907864), (4, 4953932), (8, 2476966), (16, 1238483), (61, 324848), (79, 250832), (122, 162424), (158, 125416), (244, 81212), (257, 77104), (316, 62708), (488, 40606), (514, 38552), (632, 31354), (976, 20303), (1028, 19276), (1264, 15677), (2056, 9638), (4112, 4819)]