18929840

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{449}}^1$

素因数の和:510

約数の個数: 80

約数和(自身を含む): 48211200

約数和(自身を除く): 29281360

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 34, 40, 62, 68, 80, 85, 124, 136, 155, 170, 248, 272, 310, 340, 449, 496, 527, 620, 680, 898, 1054, 1240, 1360, 1796, 2108, 2245, 2480, 2635, 3592, 4216, 4490, 5270, 7184, 7633, 8432, 8980, 10540, 13919, 15266, 17960, 21080, 27838, 30532, 35920, 38165, 42160, 55676, 61064, 69595, 76330, 111352, 122128, 139190, 152660, 222704, 236623, 278380, 305320, 473246, 556760, 610640, 946492, 1113520, 1183115, 1892984, 2366230, 3785968, 4732460, 9464920, 18929840]

約数ペア:

[(1, 18929840), (2, 9464920), (4, 4732460), (5, 3785968), (8, 2366230), (10, 1892984), (16, 1183115), (17, 1113520), (20, 946492), (31, 610640), (34, 556760), (40, 473246), (62, 305320), (68, 278380), (80, 236623), (85, 222704), (124, 152660), (136, 139190), (155, 122128), (170, 111352), (248, 76330), (272, 69595), (310, 61064), (340, 55676), (449, 42160), (496, 38165), (527, 35920), (620, 30532), (680, 27838), (898, 21080), (1054, 17960), (1240, 15266), (1360, 13919), (1796, 10540), (2108, 8980), (2245, 8432), (2480, 7633), (2635, 7184), (3592, 5270), (4216, 4490)]