21226920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1237}}^1$

素因数の和:1275

約数の個数: 128

約数和(自身を含む): 74874240

約数和(自身を除く): 53647320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 20, 22, 24, 26, 30, 33, 39, 40, 44, 52, 55, 60, 65, 66, 78, 88, 104, 110, 120, 130, 132, 143, 156, 165, 195, 220, 260, 264, 286, 312, 330, 390, 429, 440, 520, 572, 660, 715, 780, 858, 1144, 1237, 1320, 1430, 1560, 1716, 2145, 2474, 2860, 3432, 3711, 4290, 4948, 5720, 6185, 7422, 8580, 9896, 12370, 13607, 14844, 16081, 17160, 18555, 24740, 27214, 29688, 32162, 37110, 40821, 48243, 49480, 54428, 64324, 68035, 74220, 80405, 81642, 96486, 108856, 128648, 136070, 148440, 160810, 163284, 176891, 192972, 204105, 241215, 272140, 321620, 326568, 353782, 385944, 408210, 482430, 530673, 544280, 643240, 707564, 816420, 884455, 964860, 1061346, 1415128, 1632840, 1768910, 1929720, 2122692, 2653365, 3537820, 4245384, 5306730, 7075640, 10613460, 21226920]

約数ペア:

[(1, 21226920), (2, 10613460), (3, 7075640), (4, 5306730), (5, 4245384), (6, 3537820), (8, 2653365), (10, 2122692), (11, 1929720), (12, 1768910), (13, 1632840), (15, 1415128), (20, 1061346), (22, 964860), (24, 884455), (26, 816420), (30, 707564), (33, 643240), (39, 544280), (40, 530673), (44, 482430), (52, 408210), (55, 385944), (60, 353782), (65, 326568), (66, 321620), (78, 272140), (88, 241215), (104, 204105), (110, 192972), (120, 176891), (130, 163284), (132, 160810), (143, 148440), (156, 136070), (165, 128648), (195, 108856), (220, 96486), (260, 81642), (264, 80405), (286, 74220), (312, 68035), (330, 64324), (390, 54428), (429, 49480), (440, 48243), (520, 40821), (572, 37110), (660, 32162), (715, 29688), (780, 27214), (858, 24740), (1144, 18555), (1237, 17160), (1320, 16081), (1430, 14844), (1560, 13607), (1716, 12370), (2145, 9896), (2474, 8580), (2860, 7422), (3432, 6185), (3711, 5720), (4290, 4948)]