21925540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1721}}^1$

素因数の和:1757

約数の個数: 72

約数和(自身を含む): 57714552

約数和(自身を除く): 35789012

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1721, 1820, 2548, 3185, 3442, 6370, 6884, 8605, 12047, 12740, 17210, 22373, 24094, 34420, 44746, 48188, 60235, 84329, 89492, 111865, 120470, 156611, 168658, 223730, 240940, 313222, 337316, 421645, 447460, 626444, 783055, 843290, 1096277, 1566110, 1686580, 2192554, 3132220, 4385108, 5481385, 10962770, 21925540]

約数ペア:

[(1, 21925540), (2, 10962770), (4, 5481385), (5, 4385108), (7, 3132220), (10, 2192554), (13, 1686580), (14, 1566110), (20, 1096277), (26, 843290), (28, 783055), (35, 626444), (49, 447460), (52, 421645), (65, 337316), (70, 313222), (91, 240940), (98, 223730), (130, 168658), (140, 156611), (182, 120470), (196, 111865), (245, 89492), (260, 84329), (364, 60235), (455, 48188), (490, 44746), (637, 34420), (910, 24094), (980, 22373), (1274, 17210), (1721, 12740), (1820, 12047), (2548, 8605), (3185, 6884), (3442, 6370)]