20425240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{761}}^1$

素因数の和:844

約数の個数: 64

約数和(自身を含む): 51023520

約数和(自身を除く): 30598280

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 61, 88, 110, 122, 220, 244, 305, 440, 488, 610, 671, 761, 1220, 1342, 1522, 2440, 2684, 3044, 3355, 3805, 5368, 6088, 6710, 7610, 8371, 13420, 15220, 16742, 26840, 30440, 33484, 41855, 46421, 66968, 83710, 92842, 167420, 185684, 232105, 334840, 371368, 464210, 510631, 928420, 1021262, 1856840, 2042524, 2553155, 4085048, 5106310, 10212620, 20425240]

約数ペア:

[(1, 20425240), (2, 10212620), (4, 5106310), (5, 4085048), (8, 2553155), (10, 2042524), (11, 1856840), (20, 1021262), (22, 928420), (40, 510631), (44, 464210), (55, 371368), (61, 334840), (88, 232105), (110, 185684), (122, 167420), (220, 92842), (244, 83710), (305, 66968), (440, 46421), (488, 41855), (610, 33484), (671, 30440), (761, 26840), (1220, 16742), (1342, 15220), (1522, 13420), (2440, 8371), (2684, 7610), (3044, 6710), (3355, 6088), (3805, 5368)]