20621848

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{2389}}^1$

素因数の和:2491

約数の個数: 32

約数和(自身を含む): 42159600

約数和(自身を除く): 21537752

約数列:

[1, 2, 4, 8, 13, 26, 52, 83, 104, 166, 332, 664, 1079, 2158, 2389, 4316, 4778, 8632, 9556, 19112, 31057, 62114, 124228, 198287, 248456, 396574, 793148, 1586296, 2577731, 5155462, 10310924, 20621848]

約数ペア:

[(1, 20621848), (2, 10310924), (4, 5155462), (8, 2577731), (13, 1586296), (26, 793148), (52, 396574), (83, 248456), (104, 198287), (166, 124228), (332, 62114), (664, 31057), (1079, 19112), (2158, 9556), (2389, 8632), (4316, 4778)]