18780208

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{379}}^1$

素因数の和:569

約数の個数: 40

約数和(自身を含む): 38638400

約数和(自身を除く): 19858192

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 163, 304, 326, 379, 652, 758, 1304, 1516, 2608, 3032, 3097, 6064, 6194, 7201, 12388, 14402, 24776, 28804, 49552, 57608, 61777, 115216, 123554, 247108, 494216, 988432, 1173763, 2347526, 4695052, 9390104, 18780208]

約数ペア:

[(1, 18780208), (2, 9390104), (4, 4695052), (8, 2347526), (16, 1173763), (19, 988432), (38, 494216), (76, 247108), (152, 123554), (163, 115216), (304, 61777), (326, 57608), (379, 49552), (652, 28804), (758, 24776), (1304, 14402), (1516, 12388), (2608, 7201), (3032, 6194), (3097, 6064)]