18390420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1439}}^1$

素因数の和:1525

約数の個数: 72

約数和(自身を含む): 56609280

約数和(自身を除く): 38218860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 71, 90, 142, 180, 213, 284, 355, 426, 639, 710, 852, 1065, 1278, 1420, 1439, 2130, 2556, 2878, 3195, 4260, 4317, 5756, 6390, 7195, 8634, 12780, 12951, 14390, 17268, 21585, 25902, 28780, 43170, 51804, 64755, 86340, 102169, 129510, 204338, 259020, 306507, 408676, 510845, 613014, 919521, 1021690, 1226028, 1532535, 1839042, 2043380, 3065070, 3678084, 4597605, 6130140, 9195210, 18390420]

約数ペア:

[(1, 18390420), (2, 9195210), (3, 6130140), (4, 4597605), (5, 3678084), (6, 3065070), (9, 2043380), (10, 1839042), (12, 1532535), (15, 1226028), (18, 1021690), (20, 919521), (30, 613014), (36, 510845), (45, 408676), (60, 306507), (71, 259020), (90, 204338), (142, 129510), (180, 102169), (213, 86340), (284, 64755), (355, 51804), (426, 43170), (639, 28780), (710, 25902), (852, 21585), (1065, 17268), (1278, 14390), (1420, 12951), (1439, 12780), (2130, 8634), (2556, 7195), (2878, 6390), (3195, 5756), (4260, 4317)]