About the Number

121816890

121816889 ← → 121816891

2進数表記:111010000101100011100111010

漢数字表記:一億二千百八十一万六千八百九十

素因数分解:

2 1 × 3 2 × 5 1 × 13 2 × 8009 1

素因数の和:8048
約数の個数: 72
約数和(自身を含む): 343004220
約数和(自身を除く): 221187330

約数列:
[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 39, 45, 65, 78, 90, 117, 130, 169, 195, 234, 338, 390, 507, 585, 845, 1014, 1170, 1521, 1690, 2535, 3042, 5070, 7605, 8009, 15210, 16018, 24027, 40045, 48054, 72081, 80090, 104117, 120135, 144162, 208234, 240270, 312351, 360405, 520585, 624702, 720810, 937053, 1041170, 1353521, 1561755, 1874106, 2707042, 3123510, 4060563, 4685265, 6767605, 8121126, 9370530, 12181689, 13535210, 20302815, 24363378, 40605630, 60908445, 121816890]

約数ペア:
[(1, 121816890), (2, 60908445), (3, 40605630), (5, 24363378), (6, 20302815), (9, 13535210), (10, 12181689), (13, 9370530), (15, 8121126), (18, 6767605), (26, 4685265), (30, 4060563), (39, 3123510), (45, 2707042), (65, 1874106), (78, 1561755), (90, 1353521), (117, 1041170), (130, 937053), (169, 720810), (195, 624702), (234, 520585), (338, 360405), (390, 312351), (507, 240270), (585, 208234), (845, 144162), (1014, 120135), (1170, 104117), (1521, 80090), (1690, 72081), (2535, 48054), (3042, 40045), (5070, 24027), (7605, 16018), (8009, 15210)]

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