19937205

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{6421}}^1$

素因数の和:6458

約数の個数: 32

約数和(自身を含む): 36990720

約数和(自身を除く): 17053515

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 6421, 19263, 32105, 57789, 96315, 147683, 173367, 288945, 443049, 738415, 866835, 1329147, 2215245, 3987441, 6645735, 19937205]

約数ペア:

[(1, 19937205), (3, 6645735), (5, 3987441), (9, 2215245), (15, 1329147), (23, 866835), (27, 738415), (45, 443049), (69, 288945), (115, 173367), (135, 147683), (207, 96315), (345, 57789), (621, 32105), (1035, 19263), (3105, 6421)]