20121788450

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{359}}^1\times {\mathrm{36161}}^1$

素因数の和:36563

約数の個数: 48

約数和(自身を含む): 38742520320

約数和(自身を除く): 18620731870

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 155, 310, 359, 718, 775, 1550, 1795, 3590, 8975, 11129, 17950, 22258, 36161, 55645, 72322, 111290, 180805, 278225, 361610, 556450, 904025, 1120991, 1808050, 2241982, 5604955, 11209910, 12981799, 25963598, 28024775, 56049550, 64908995, 129817990, 324544975, 402435769, 649089950, 804871538, 2012178845, 4024357690, 10060894225, 20121788450]

約数ペア:

[(1, 20121788450), (2, 10060894225), (5, 4024357690), (10, 2012178845), (25, 804871538), (31, 649089950), (50, 402435769), (62, 324544975), (155, 129817990), (310, 64908995), (359, 56049550), (718, 28024775), (775, 25963598), (1550, 12981799), (1795, 11209910), (3590, 5604955), (8975, 2241982), (11129, 1808050), (17950, 1120991), (22258, 904025), (36161, 556450), (55645, 361610), (72322, 278225), (111290, 180805)]