19912620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{521}}^1$

素因数の和:560

約数の個数: 144

約数和(自身を含む): 69981408

約数和(自身を除く): 50068788

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 49, 52, 60, 65, 70, 78, 84, 91, 98, 105, 130, 140, 147, 156, 182, 195, 196, 210, 245, 260, 273, 294, 364, 390, 420, 455, 490, 521, 546, 588, 637, 735, 780, 910, 980, 1042, 1092, 1274, 1365, 1470, 1563, 1820, 1911, 2084, 2548, 2605, 2730, 2940, 3126, 3185, 3647, 3822, 5210, 5460, 6252, 6370, 6773, 7294, 7644, 7815, 9555, 10420, 10941, 12740, 13546, 14588, 15630, 18235, 19110, 20319, 21882, 25529, 27092, 31260, 33865, 36470, 38220, 40638, 43764, 47411, 51058, 54705, 67730, 72940, 76587, 81276, 94822, 101595, 102116, 109410, 127645, 135460, 142233, 153174, 189644, 203190, 218820, 237055, 255290, 284466, 306348, 331877, 382935, 406380, 474110, 510580, 568932, 663754, 711165, 765870, 948220, 995631, 1327508, 1422330, 1531740, 1659385, 1991262, 2844660, 3318770, 3982524, 4978155, 6637540, 9956310, 19912620]

約数ペア:

[(1, 19912620), (2, 9956310), (3, 6637540), (4, 4978155), (5, 3982524), (6, 3318770), (7, 2844660), (10, 1991262), (12, 1659385), (13, 1531740), (14, 1422330), (15, 1327508), (20, 995631), (21, 948220), (26, 765870), (28, 711165), (30, 663754), (35, 568932), (39, 510580), (42, 474110), (49, 406380), (52, 382935), (60, 331877), (65, 306348), (70, 284466), (78, 255290), (84, 237055), (91, 218820), (98, 203190), (105, 189644), (130, 153174), (140, 142233), (147, 135460), (156, 127645), (182, 109410), (195, 102116), (196, 101595), (210, 94822), (245, 81276), (260, 76587), (273, 72940), (294, 67730), (364, 54705), (390, 51058), (420, 47411), (455, 43764), (490, 40638), (521, 38220), (546, 36470), (588, 33865), (637, 31260), (735, 27092), (780, 25529), (910, 21882), (980, 20319), (1042, 19110), (1092, 18235), (1274, 15630), (1365, 14588), (1470, 13546), (1563, 12740), (1820, 10941), (1911, 10420), (2084, 9555), (2548, 7815), (2605, 7644), (2730, 7294), (2940, 6773), (3126, 6370), (3185, 6252), (3647, 5460), (3822, 5210)]