20990450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{751}}^1$

素因数の和:819

約数の個数: 48

約数和(自身を含む): 43080576

約数和(自身を除く): 22090126

約数列:

[1, 2, 5, 10, 13, 25, 26, 43, 50, 65, 86, 130, 215, 325, 430, 559, 650, 751, 1075, 1118, 1502, 2150, 2795, 3755, 5590, 7510, 9763, 13975, 18775, 19526, 27950, 32293, 37550, 48815, 64586, 97630, 161465, 244075, 322930, 419809, 488150, 807325, 839618, 1614650, 2099045, 4198090, 10495225, 20990450]

約数ペア:

[(1, 20990450), (2, 10495225), (5, 4198090), (10, 2099045), (13, 1614650), (25, 839618), (26, 807325), (43, 488150), (50, 419809), (65, 322930), (86, 244075), (130, 161465), (215, 97630), (325, 64586), (430, 48815), (559, 37550), (650, 32293), (751, 27950), (1075, 19526), (1118, 18775), (1502, 13975), (2150, 9763), (2795, 7510), (3755, 5590)]