19973331

素因数分解:

$3^3\times 7^2\times {\mathrm{31}}^1\times {\mathrm{487}}^1$

素因数の和:541

約数の個数: 48

約数和(自身を含む): 35604480

約数和(自身を除く): 15631149

約数列:

[1, 3, 7, 9, 21, 27, 31, 49, 63, 93, 147, 189, 217, 279, 441, 487, 651, 837, 1323, 1461, 1519, 1953, 3409, 4383, 4557, 5859, 10227, 13149, 13671, 15097, 23863, 30681, 41013, 45291, 71589, 92043, 105679, 135873, 214767, 317037, 407619, 644301, 739753, 951111, 2219259, 2853333, 6657777, 19973331]

約数ペア:

[(1, 19973331), (3, 6657777), (7, 2853333), (9, 2219259), (21, 951111), (27, 739753), (31, 644301), (49, 407619), (63, 317037), (93, 214767), (147, 135873), (189, 105679), (217, 92043), (279, 71589), (441, 45291), (487, 41013), (651, 30681), (837, 23863), (1323, 15097), (1461, 13671), (1519, 13149), (1953, 10227), (3409, 5859), (4383, 4557)]