20161971400

素因数分解:

$2^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{15661}}^1$

素因数の和:15875

約数の個数: 96

約数和(自身を含む): 48328859880

約数和(自身を除く): 28166888480

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 157, 164, 200, 205, 314, 328, 410, 628, 785, 820, 1025, 1256, 1570, 1640, 2050, 3140, 3925, 4100, 6280, 6437, 7850, 8200, 12874, 15661, 15700, 25748, 31322, 31400, 32185, 51496, 62644, 64370, 78305, 125288, 128740, 156610, 160925, 257480, 313220, 321850, 391525, 626440, 642101, 643700, 783050, 1284202, 1287400, 1566100, 2458777, 2568404, 3132200, 3210505, 4917554, 5136808, 6421010, 9835108, 12293885, 12842020, 16052525, 19670216, 24587770, 25684040, 32105050, 49175540, 61469425, 64210100, 98351080, 100809857, 122938850, 128420200, 201619714, 245877700, 403239428, 491755400, 504049285, 806478856, 1008098570, 2016197140, 2520246425, 4032394280, 5040492850, 10080985700, 20161971400]

約数ペア:

[(1, 20161971400), (2, 10080985700), (4, 5040492850), (5, 4032394280), (8, 2520246425), (10, 2016197140), (20, 1008098570), (25, 806478856), (40, 504049285), (41, 491755400), (50, 403239428), (82, 245877700), (100, 201619714), (157, 128420200), (164, 122938850), (200, 100809857), (205, 98351080), (314, 64210100), (328, 61469425), (410, 49175540), (628, 32105050), (785, 25684040), (820, 24587770), (1025, 19670216), (1256, 16052525), (1570, 12842020), (1640, 12293885), (2050, 9835108), (3140, 6421010), (3925, 5136808), (4100, 4917554), (6280, 3210505), (6437, 3132200), (7850, 2568404), (8200, 2458777), (12874, 1566100), (15661, 1287400), (15700, 1284202), (25748, 783050), (31322, 643700), (31400, 642101), (32185, 626440), (51496, 391525), (62644, 321850), (64370, 313220), (78305, 257480), (125288, 160925), (128740, 156610)]