17981320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{431}}^1$

素因数の和:598

約数の個数: 64

約数和(自身を含む): 46656000

約数和(自身を除く): 28674680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 149, 280, 298, 431, 596, 745, 862, 1043, 1192, 1490, 1724, 2086, 2155, 2980, 3017, 3448, 4172, 4310, 5215, 5960, 6034, 8344, 8620, 10430, 12068, 15085, 17240, 20860, 24136, 30170, 41720, 60340, 64219, 120680, 128438, 256876, 321095, 449533, 513752, 642190, 899066, 1284380, 1798132, 2247665, 2568760, 3596264, 4495330, 8990660, 17981320]

約数ペア:

[(1, 17981320), (2, 8990660), (4, 4495330), (5, 3596264), (7, 2568760), (8, 2247665), (10, 1798132), (14, 1284380), (20, 899066), (28, 642190), (35, 513752), (40, 449533), (56, 321095), (70, 256876), (140, 128438), (149, 120680), (280, 64219), (298, 60340), (431, 41720), (596, 30170), (745, 24136), (862, 20860), (1043, 17240), (1192, 15085), (1490, 12068), (1724, 10430), (2086, 8620), (2155, 8344), (2980, 6034), (3017, 5960), (3448, 5215), (4172, 4310)]