20376400

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^2\times {\mathrm{421}}^1$

素因数の和:461

約数の個数: 90

約数和(自身を含む): 53937086

約数和(自身を除く): 33560686

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 110, 121, 176, 200, 220, 242, 275, 400, 421, 440, 484, 550, 605, 842, 880, 968, 1100, 1210, 1684, 1936, 2105, 2200, 2420, 3025, 3368, 4210, 4400, 4631, 4840, 6050, 6736, 8420, 9262, 9680, 10525, 12100, 16840, 18524, 21050, 23155, 24200, 33680, 37048, 42100, 46310, 48400, 50941, 74096, 84200, 92620, 101882, 115775, 168400, 185240, 203764, 231550, 254705, 370480, 407528, 463100, 509410, 815056, 926200, 1018820, 1273525, 1852400, 2037640, 2547050, 4075280, 5094100, 10188200, 20376400]

約数ペア:

[(1, 20376400), (2, 10188200), (4, 5094100), (5, 4075280), (8, 2547050), (10, 2037640), (11, 1852400), (16, 1273525), (20, 1018820), (22, 926200), (25, 815056), (40, 509410), (44, 463100), (50, 407528), (55, 370480), (80, 254705), (88, 231550), (100, 203764), (110, 185240), (121, 168400), (176, 115775), (200, 101882), (220, 92620), (242, 84200), (275, 74096), (400, 50941), (421, 48400), (440, 46310), (484, 42100), (550, 37048), (605, 33680), (842, 24200), (880, 23155), (968, 21050), (1100, 18524), (1210, 16840), (1684, 12100), (1936, 10525), (2105, 9680), (2200, 9262), (2420, 8420), (3025, 6736), (3368, 6050), (4210, 4840), (4400, 4631)]