20514975

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{397}}^1$

素因数の和:476

約数の個数: 48

約数和(自身を含む): 37310112

約数和(自身を除く): 16795137

約数列:

[1, 3, 5, 13, 15, 25, 39, 53, 65, 75, 159, 195, 265, 325, 397, 689, 795, 975, 1191, 1325, 1985, 2067, 3445, 3975, 5161, 5955, 9925, 10335, 15483, 17225, 21041, 25805, 29775, 51675, 63123, 77415, 105205, 129025, 273533, 315615, 387075, 526025, 820599, 1367665, 1578075, 4102995, 6838325, 20514975]

約数ペア:

[(1, 20514975), (3, 6838325), (5, 4102995), (13, 1578075), (15, 1367665), (25, 820599), (39, 526025), (53, 387075), (65, 315615), (75, 273533), (159, 129025), (195, 105205), (265, 77415), (325, 63123), (397, 51675), (689, 29775), (795, 25805), (975, 21041), (1191, 17225), (1325, 15483), (1985, 10335), (2067, 9925), (3445, 5955), (3975, 5161)]