20177025

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{661}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 37432128

約数和(自身を除く): 17255103

約数列:

[1, 3, 5, 11, 15, 25, 33, 37, 55, 75, 111, 165, 185, 275, 407, 555, 661, 825, 925, 1221, 1983, 2035, 2775, 3305, 6105, 7271, 9915, 10175, 16525, 21813, 24457, 30525, 36355, 49575, 73371, 109065, 122285, 181775, 269027, 366855, 545325, 611425, 807081, 1345135, 1834275, 4035405, 6725675, 20177025]

約数ペア:

[(1, 20177025), (3, 6725675), (5, 4035405), (11, 1834275), (15, 1345135), (25, 807081), (33, 611425), (37, 545325), (55, 366855), (75, 269027), (111, 181775), (165, 122285), (185, 109065), (275, 73371), (407, 49575), (555, 36355), (661, 30525), (825, 24457), (925, 21813), (1221, 16525), (1983, 10175), (2035, 9915), (2775, 7271), (3305, 6105)]