18988120

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{15313}}^1$

素因数の和:15355

約数の個数: 32

約数和(自身を含む): 44104320

約数和(自身を除く): 25116200

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 15313, 30626, 61252, 76565, 122504, 153130, 306260, 474703, 612520, 949406, 1898812, 2373515, 3797624, 4747030, 9494060, 18988120]

約数ペア:

[(1, 18988120), (2, 9494060), (4, 4747030), (5, 3797624), (8, 2373515), (10, 1898812), (20, 949406), (31, 612520), (40, 474703), (62, 306260), (124, 153130), (155, 122504), (248, 76565), (310, 61252), (620, 30626), (1240, 15313)]