20049813

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 35133696

約数和(自身を除く): 15083883

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 101, 137, 161, 207, 303, 411, 483, 707, 909, 959, 1233, 1449, 2121, 2323, 2877, 3151, 6363, 6969, 8631, 9453, 13837, 16261, 20907, 22057, 28359, 41511, 48783, 66171, 96859, 124533, 146349, 198513, 290577, 318251, 871731, 954753, 2227757, 2864259, 6683271, 20049813]

約数ペア:

[(1, 20049813), (3, 6683271), (7, 2864259), (9, 2227757), (21, 954753), (23, 871731), (63, 318251), (69, 290577), (101, 198513), (137, 146349), (161, 124533), (207, 96859), (303, 66171), (411, 48783), (483, 41511), (707, 28359), (909, 22057), (959, 20907), (1233, 16261), (1449, 13837), (2121, 9453), (2323, 8631), (2877, 6969), (3151, 6363)]