20071700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:353

約数の個数: 72

約数和(自身を含む): 48371904

約数和(自身を除く): 28300204

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 71, 100, 110, 142, 220, 257, 275, 284, 355, 514, 550, 710, 781, 1028, 1100, 1285, 1420, 1562, 1775, 2570, 2827, 3124, 3550, 3905, 5140, 5654, 6425, 7100, 7810, 11308, 12850, 14135, 15620, 18247, 19525, 25700, 28270, 36494, 39050, 56540, 70675, 72988, 78100, 91235, 141350, 182470, 200717, 282700, 364940, 401434, 456175, 802868, 912350, 1003585, 1824700, 2007170, 4014340, 5017925, 10035850, 20071700]

約数ペア:

[(1, 20071700), (2, 10035850), (4, 5017925), (5, 4014340), (10, 2007170), (11, 1824700), (20, 1003585), (22, 912350), (25, 802868), (44, 456175), (50, 401434), (55, 364940), (71, 282700), (100, 200717), (110, 182470), (142, 141350), (220, 91235), (257, 78100), (275, 72988), (284, 70675), (355, 56540), (514, 39050), (550, 36494), (710, 28270), (781, 25700), (1028, 19525), (1100, 18247), (1285, 15620), (1420, 14135), (1562, 12850), (1775, 11308), (2570, 7810), (2827, 7100), (3124, 6425), (3550, 5654), (3905, 5140)]