8990660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{431}}^1$

素因数の和:596

約数の個数: 48

約数和(自身を含む): 21772800

約数和(自身を除く): 12782140

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 431, 596, 745, 862, 1043, 1490, 1724, 2086, 2155, 2980, 3017, 4172, 4310, 5215, 6034, 8620, 10430, 12068, 15085, 20860, 30170, 60340, 64219, 128438, 256876, 321095, 449533, 642190, 899066, 1284380, 1798132, 2247665, 4495330, 8990660]

約数ペア:

[(1, 8990660), (2, 4495330), (4, 2247665), (5, 1798132), (7, 1284380), (10, 899066), (14, 642190), (20, 449533), (28, 321095), (35, 256876), (70, 128438), (140, 64219), (149, 60340), (298, 30170), (431, 20860), (596, 15085), (745, 12068), (862, 10430), (1043, 8620), (1490, 6034), (1724, 5215), (2086, 4310), (2155, 4172), (2980, 3017)]