21122920

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{829}}^1$

素因数の和:867

約数の個数: 96

約数和(自身を含む): 59610600

約数和(自身を除く): 38487680

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 49, 52, 56, 65, 70, 91, 98, 104, 130, 140, 182, 196, 245, 260, 280, 364, 392, 455, 490, 520, 637, 728, 829, 910, 980, 1274, 1658, 1820, 1960, 2548, 3185, 3316, 3640, 4145, 5096, 5803, 6370, 6632, 8290, 10777, 11606, 12740, 16580, 21554, 23212, 25480, 29015, 33160, 40621, 43108, 46424, 53885, 58030, 75439, 81242, 86216, 107770, 116060, 150878, 162484, 203105, 215540, 232120, 301756, 324968, 377195, 406210, 431080, 528073, 603512, 754390, 812420, 1056146, 1508780, 1624840, 2112292, 2640365, 3017560, 4224584, 5280730, 10561460, 21122920]

約数ペア:

[(1, 21122920), (2, 10561460), (4, 5280730), (5, 4224584), (7, 3017560), (8, 2640365), (10, 2112292), (13, 1624840), (14, 1508780), (20, 1056146), (26, 812420), (28, 754390), (35, 603512), (40, 528073), (49, 431080), (52, 406210), (56, 377195), (65, 324968), (70, 301756), (91, 232120), (98, 215540), (104, 203105), (130, 162484), (140, 150878), (182, 116060), (196, 107770), (245, 86216), (260, 81242), (280, 75439), (364, 58030), (392, 53885), (455, 46424), (490, 43108), (520, 40621), (637, 33160), (728, 29015), (829, 25480), (910, 23212), (980, 21554), (1274, 16580), (1658, 12740), (1820, 11606), (1960, 10777), (2548, 8290), (3185, 6632), (3316, 6370), (3640, 5803), (4145, 5096)]