18720650

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{347}}^1$

素因数の和:455

約数の個数: 48

約数和(自身を含む): 38060064

約数和(自身を除く): 19339414

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 83, 130, 166, 325, 347, 415, 650, 694, 830, 1079, 1735, 2075, 2158, 3470, 4150, 4511, 5395, 8675, 9022, 10790, 17350, 22555, 26975, 28801, 45110, 53950, 57602, 112775, 144005, 225550, 288010, 374413, 720025, 748826, 1440050, 1872065, 3744130, 9360325, 18720650]

約数ペア:

[(1, 18720650), (2, 9360325), (5, 3744130), (10, 1872065), (13, 1440050), (25, 748826), (26, 720025), (50, 374413), (65, 288010), (83, 225550), (130, 144005), (166, 112775), (325, 57602), (347, 53950), (415, 45110), (650, 28801), (694, 26975), (830, 22555), (1079, 17350), (1735, 10790), (2075, 9022), (2158, 8675), (3470, 5395), (4150, 4511)]