20478540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1181}}^1$

素因数の和:1227

約数の個数: 72

約数和(自身を含む): 60962832

約数和(自身を除く): 40484292

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 289, 340, 510, 578, 867, 1020, 1156, 1181, 1445, 1734, 2362, 2890, 3468, 3543, 4335, 4724, 5780, 5905, 7086, 8670, 11810, 14172, 17340, 17715, 20077, 23620, 35430, 40154, 60231, 70860, 80308, 100385, 120462, 200770, 240924, 301155, 341309, 401540, 602310, 682618, 1023927, 1204620, 1365236, 1706545, 2047854, 3413090, 4095708, 5119635, 6826180, 10239270, 20478540]

約数ペア:

[(1, 20478540), (2, 10239270), (3, 6826180), (4, 5119635), (5, 4095708), (6, 3413090), (10, 2047854), (12, 1706545), (15, 1365236), (17, 1204620), (20, 1023927), (30, 682618), (34, 602310), (51, 401540), (60, 341309), (68, 301155), (85, 240924), (102, 200770), (170, 120462), (204, 100385), (255, 80308), (289, 70860), (340, 60231), (510, 40154), (578, 35430), (867, 23620), (1020, 20077), (1156, 17715), (1181, 17340), (1445, 14172), (1734, 11810), (2362, 8670), (2890, 7086), (3468, 5905), (3543, 5780), (4335, 4724)]