18505340

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{821}}^1$

素因数の和:867

約数の個数: 72

約数和(自身を含む): 47228832

約数和(自身を除く): 28723492

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 230, 245, 322, 460, 490, 644, 805, 821, 980, 1127, 1610, 1642, 2254, 3220, 3284, 4105, 4508, 5635, 5747, 8210, 11270, 11494, 16420, 18883, 22540, 22988, 28735, 37766, 40229, 57470, 75532, 80458, 94415, 114940, 132181, 160916, 188830, 201145, 264362, 377660, 402290, 528724, 660905, 804580, 925267, 1321810, 1850534, 2643620, 3701068, 4626335, 9252670, 18505340]

約数ペア:

[(1, 18505340), (2, 9252670), (4, 4626335), (5, 3701068), (7, 2643620), (10, 1850534), (14, 1321810), (20, 925267), (23, 804580), (28, 660905), (35, 528724), (46, 402290), (49, 377660), (70, 264362), (92, 201145), (98, 188830), (115, 160916), (140, 132181), (161, 114940), (196, 94415), (230, 80458), (245, 75532), (322, 57470), (460, 40229), (490, 37766), (644, 28735), (805, 22988), (821, 22540), (980, 18883), (1127, 16420), (1610, 11494), (1642, 11270), (2254, 8210), (3220, 5747), (3284, 5635), (4105, 4508)]