18885780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{439}}^1$

素因数の和:693

約数の個数: 72

約数和(自身を含む): 57657600

約数和(自身を除く): 38771820

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 239, 439, 478, 717, 878, 956, 1195, 1317, 1434, 1756, 2151, 2195, 2390, 2634, 2868, 3585, 3951, 4302, 4390, 4780, 5268, 6585, 7170, 7902, 8604, 8780, 10755, 13170, 14340, 15804, 19755, 21510, 26340, 39510, 43020, 79020, 104921, 209842, 314763, 419684, 524605, 629526, 944289, 1049210, 1259052, 1573815, 1888578, 2098420, 3147630, 3777156, 4721445, 6295260, 9442890, 18885780]

約数ペア:

[(1, 18885780), (2, 9442890), (3, 6295260), (4, 4721445), (5, 3777156), (6, 3147630), (9, 2098420), (10, 1888578), (12, 1573815), (15, 1259052), (18, 1049210), (20, 944289), (30, 629526), (36, 524605), (45, 419684), (60, 314763), (90, 209842), (180, 104921), (239, 79020), (439, 43020), (478, 39510), (717, 26340), (878, 21510), (956, 19755), (1195, 15804), (1317, 14340), (1434, 13170), (1756, 10755), (2151, 8780), (2195, 8604), (2390, 7902), (2634, 7170), (2868, 6585), (3585, 5268), (3951, 4780), (4302, 4390)]