19980306

素因数分解:

$2^1\times 3^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{587}}^1$

素因数の和:687

約数の個数: 48

約数和(自身を含む): 45497088

約数和(自身を除く): 25516782

約数列:

[1, 2, 3, 6, 9, 18, 31, 61, 62, 93, 122, 183, 186, 279, 366, 549, 558, 587, 1098, 1174, 1761, 1891, 3522, 3782, 5283, 5673, 10566, 11346, 17019, 18197, 34038, 35807, 36394, 54591, 71614, 107421, 109182, 163773, 214842, 322263, 327546, 644526, 1110017, 2220034, 3330051, 6660102, 9990153, 19980306]

約数ペア:

[(1, 19980306), (2, 9990153), (3, 6660102), (6, 3330051), (9, 2220034), (18, 1110017), (31, 644526), (61, 327546), (62, 322263), (93, 214842), (122, 163773), (183, 109182), (186, 107421), (279, 71614), (366, 54591), (549, 36394), (558, 35807), (587, 34038), (1098, 18197), (1174, 17019), (1761, 11346), (1891, 10566), (3522, 5673), (3782, 5283)]