21111480

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{347}}^1$

素因数の和:390

約数の個数: 144

約数和(自身を含む): 74510280

約数和(自身を除く): 53398800

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 24, 26, 30, 36, 39, 40, 45, 52, 60, 65, 72, 78, 90, 104, 117, 120, 130, 156, 169, 180, 195, 234, 260, 312, 338, 347, 360, 390, 468, 507, 520, 585, 676, 694, 780, 845, 936, 1014, 1041, 1170, 1352, 1388, 1521, 1560, 1690, 1735, 2028, 2082, 2340, 2535, 2776, 3042, 3123, 3380, 3470, 4056, 4164, 4511, 4680, 5070, 5205, 6084, 6246, 6760, 6940, 7605, 8328, 9022, 10140, 10410, 12168, 12492, 13533, 13880, 15210, 15615, 18044, 20280, 20820, 22555, 24984, 27066, 30420, 31230, 36088, 40599, 41640, 45110, 54132, 58643, 60840, 62460, 67665, 81198, 90220, 108264, 117286, 124920, 135330, 162396, 175929, 180440, 202995, 234572, 270660, 293215, 324792, 351858, 405990, 469144, 527787, 541320, 586430, 703716, 811980, 879645, 1055574, 1172860, 1407432, 1623960, 1759290, 2111148, 2345720, 2638935, 3518580, 4222296, 5277870, 7037160, 10555740, 21111480]

約数ペア:

[(1, 21111480), (2, 10555740), (3, 7037160), (4, 5277870), (5, 4222296), (6, 3518580), (8, 2638935), (9, 2345720), (10, 2111148), (12, 1759290), (13, 1623960), (15, 1407432), (18, 1172860), (20, 1055574), (24, 879645), (26, 811980), (30, 703716), (36, 586430), (39, 541320), (40, 527787), (45, 469144), (52, 405990), (60, 351858), (65, 324792), (72, 293215), (78, 270660), (90, 234572), (104, 202995), (117, 180440), (120, 175929), (130, 162396), (156, 135330), (169, 124920), (180, 117286), (195, 108264), (234, 90220), (260, 81198), (312, 67665), (338, 62460), (347, 60840), (360, 58643), (390, 54132), (468, 45110), (507, 41640), (520, 40599), (585, 36088), (676, 31230), (694, 30420), (780, 27066), (845, 24984), (936, 22555), (1014, 20820), (1041, 20280), (1170, 18044), (1352, 15615), (1388, 15210), (1521, 13880), (1560, 13533), (1690, 12492), (1735, 12168), (2028, 10410), (2082, 10140), (2340, 9022), (2535, 8328), (2776, 7605), (3042, 6940), (3123, 6760), (3380, 6246), (3470, 6084), (4056, 5205), (4164, 5070), (4511, 4680)]