20128550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{179}}^1$

素因数の和:377

約数の個数: 48

約数和(自身を含む): 40778640

約数和(自身を除く): 20650090

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 173, 179, 325, 346, 358, 650, 865, 895, 1730, 1790, 2249, 2327, 4325, 4475, 4498, 4654, 8650, 8950, 11245, 11635, 22490, 23270, 30967, 56225, 58175, 61934, 112450, 116350, 154835, 309670, 402571, 774175, 805142, 1548350, 2012855, 4025710, 10064275, 20128550]

約数ペア:

[(1, 20128550), (2, 10064275), (5, 4025710), (10, 2012855), (13, 1548350), (25, 805142), (26, 774175), (50, 402571), (65, 309670), (130, 154835), (173, 116350), (179, 112450), (325, 61934), (346, 58175), (358, 56225), (650, 30967), (865, 23270), (895, 22490), (1730, 11635), (1790, 11245), (2249, 8950), (2327, 8650), (4325, 4654), (4475, 4498)]