18521279

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 23970816

約数和(自身を除く): 5449537

約数列:

[1, 7, 17, 23, 67, 101, 119, 161, 391, 469, 707, 1139, 1541, 1717, 2323, 2737, 6767, 7973, 10787, 12019, 16261, 26197, 39491, 47369, 115039, 155641, 183379, 276437, 805273, 1089487, 2645897, 18521279]

約数ペア:

[(1, 18521279), (7, 2645897), (17, 1089487), (23, 805273), (67, 276437), (101, 183379), (119, 155641), (161, 115039), (391, 47369), (469, 39491), (707, 26197), (1139, 16261), (1541, 12019), (1717, 10787), (2323, 7973), (2737, 6767)]