18820568

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:196

約数の個数: 64

約数和(自身を含む): 40155360

約数和(自身を除く): 21334792

約数列:

[1, 2, 4, 8, 13, 26, 37, 52, 67, 73, 74, 104, 134, 146, 148, 268, 292, 296, 481, 536, 584, 871, 949, 962, 1742, 1898, 1924, 2479, 2701, 3484, 3796, 3848, 4891, 4958, 5402, 6968, 7592, 9782, 9916, 10804, 19564, 19832, 21608, 32227, 35113, 39128, 63583, 64454, 70226, 127166, 128908, 140452, 180967, 254332, 257816, 280904, 361934, 508664, 723868, 1447736, 2352571, 4705142, 9410284, 18820568]

約数ペア:

[(1, 18820568), (2, 9410284), (4, 4705142), (8, 2352571), (13, 1447736), (26, 723868), (37, 508664), (52, 361934), (67, 280904), (73, 257816), (74, 254332), (104, 180967), (134, 140452), (146, 128908), (148, 127166), (268, 70226), (292, 64454), (296, 63583), (481, 39128), (536, 35113), (584, 32227), (871, 21608), (949, 19832), (962, 19564), (1742, 10804), (1898, 9916), (1924, 9782), (2479, 7592), (2701, 6968), (3484, 5402), (3796, 4958), (3848, 4891)]