21000663440

素因数分解:

$2^4\times 5^1\times {\mathrm{3733}}^1\times {\mathrm{70321}}^1$

素因数の和:74067

約数の個数: 40

約数和(自身を含む): 48840316728

約数和(自身を除く): 27839653288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3733, 7466, 14932, 18665, 29864, 37330, 59728, 70321, 74660, 140642, 149320, 281284, 298640, 351605, 562568, 703210, 1125136, 1406420, 2812840, 5625680, 262508293, 525016586, 1050033172, 1312541465, 2100066344, 2625082930, 4200132688, 5250165860, 10500331720, 21000663440]

約数ペア:

[(1, 21000663440), (2, 10500331720), (4, 5250165860), (5, 4200132688), (8, 2625082930), (10, 2100066344), (16, 1312541465), (20, 1050033172), (40, 525016586), (80, 262508293), (3733, 5625680), (7466, 2812840), (14932, 1406420), (18665, 1125136), (29864, 703210), (37330, 562568), (59728, 351605), (70321, 298640), (74660, 281284), (140642, 149320)]