21806590

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:193

約数の個数: 64

約数和(自身を含む): 44706816

約数和(自身を除く): 22900226

約数列:

[1, 2, 5, 10, 13, 26, 43, 47, 65, 83, 86, 94, 130, 166, 215, 235, 415, 430, 470, 559, 611, 830, 1079, 1118, 1222, 2021, 2158, 2795, 3055, 3569, 3901, 4042, 5395, 5590, 6110, 7138, 7802, 10105, 10790, 17845, 19505, 20210, 26273, 35690, 39010, 46397, 50713, 52546, 92794, 101426, 131365, 167743, 231985, 253565, 262730, 335486, 463970, 507130, 838715, 1677430, 2180659, 4361318, 10903295, 21806590]

約数ペア:

[(1, 21806590), (2, 10903295), (5, 4361318), (10, 2180659), (13, 1677430), (26, 838715), (43, 507130), (47, 463970), (65, 335486), (83, 262730), (86, 253565), (94, 231985), (130, 167743), (166, 131365), (215, 101426), (235, 92794), (415, 52546), (430, 50713), (470, 46397), (559, 39010), (611, 35690), (830, 26273), (1079, 20210), (1118, 19505), (1222, 17845), (2021, 10790), (2158, 10105), (2795, 7802), (3055, 7138), (3569, 6110), (3901, 5590), (4042, 5395)]