21902120

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1039}}^1$

素因数の和:1098

約数の個数: 64

約数和(自身を含む): 53913600

約数和(自身を除く): 32011480

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 31, 34, 40, 62, 68, 85, 124, 136, 155, 170, 248, 310, 340, 527, 620, 680, 1039, 1054, 1240, 2078, 2108, 2635, 4156, 4216, 5195, 5270, 8312, 10390, 10540, 17663, 20780, 21080, 32209, 35326, 41560, 64418, 70652, 88315, 128836, 141304, 161045, 176630, 257672, 322090, 353260, 547553, 644180, 706520, 1095106, 1288360, 2190212, 2737765, 4380424, 5475530, 10951060, 21902120]

約数ペア:

[(1, 21902120), (2, 10951060), (4, 5475530), (5, 4380424), (8, 2737765), (10, 2190212), (17, 1288360), (20, 1095106), (31, 706520), (34, 644180), (40, 547553), (62, 353260), (68, 322090), (85, 257672), (124, 176630), (136, 161045), (155, 141304), (170, 128836), (248, 88315), (310, 70652), (340, 64418), (527, 41560), (620, 35326), (680, 32209), (1039, 21080), (1054, 20780), (1240, 17663), (2078, 10540), (2108, 10390), (2635, 8312), (4156, 5270), (4216, 5195)]