51231920

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{281}}^1$

素因数の和:390

約数の個数: 80

約数和(自身を含む): 124625952

約数和(自身を除く): 73394032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 53, 80, 86, 106, 172, 212, 215, 265, 281, 344, 424, 430, 530, 562, 688, 848, 860, 1060, 1124, 1405, 1720, 2120, 2248, 2279, 2810, 3440, 4240, 4496, 4558, 5620, 9116, 11240, 11395, 12083, 14893, 18232, 22480, 22790, 24166, 29786, 36464, 45580, 48332, 59572, 60415, 74465, 91160, 96664, 119144, 120830, 148930, 182320, 193328, 238288, 241660, 297860, 483320, 595720, 640399, 966640, 1191440, 1280798, 2561596, 3201995, 5123192, 6403990, 10246384, 12807980, 25615960, 51231920]

約数ペア:

[(1, 51231920), (2, 25615960), (4, 12807980), (5, 10246384), (8, 6403990), (10, 5123192), (16, 3201995), (20, 2561596), (40, 1280798), (43, 1191440), (53, 966640), (80, 640399), (86, 595720), (106, 483320), (172, 297860), (212, 241660), (215, 238288), (265, 193328), (281, 182320), (344, 148930), (424, 120830), (430, 119144), (530, 96664), (562, 91160), (688, 74465), (848, 60415), (860, 59572), (1060, 48332), (1124, 45580), (1405, 36464), (1720, 29786), (2120, 24166), (2248, 22790), (2279, 22480), (2810, 18232), (3440, 14893), (4240, 12083), (4496, 11395), (4558, 11240), (5620, 9116)]