18735220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{821}}^1$

素因数の和:1000

約数の個数: 48

約数和(自身を含む): 45295488

約数和(自身を除く): 26560268

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 163, 326, 652, 815, 821, 1141, 1630, 1642, 2282, 3260, 3284, 4105, 4564, 5705, 5747, 8210, 11410, 11494, 16420, 22820, 22988, 28735, 57470, 114940, 133823, 267646, 535292, 669115, 936761, 1338230, 1873522, 2676460, 3747044, 4683805, 9367610, 18735220]

約数ペア:

[(1, 18735220), (2, 9367610), (4, 4683805), (5, 3747044), (7, 2676460), (10, 1873522), (14, 1338230), (20, 936761), (28, 669115), (35, 535292), (70, 267646), (140, 133823), (163, 114940), (326, 57470), (652, 28735), (815, 22988), (821, 22820), (1141, 16420), (1630, 11494), (1642, 11410), (2282, 8210), (3260, 5747), (3284, 5705), (4105, 4564)]