21741447

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{367}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 37588992

約数和(自身を除く): 15847545

約数列:

[1, 3, 7, 13, 21, 31, 39, 49, 91, 93, 147, 217, 273, 367, 403, 637, 651, 1101, 1209, 1519, 1911, 2569, 2821, 4557, 4771, 7707, 8463, 11377, 14313, 17983, 19747, 33397, 34131, 53949, 59241, 79639, 100191, 147901, 233779, 238917, 443703, 557473, 701337, 1035307, 1672419, 3105921, 7247149, 21741447]

約数ペア:

[(1, 21741447), (3, 7247149), (7, 3105921), (13, 1672419), (21, 1035307), (31, 701337), (39, 557473), (49, 443703), (91, 238917), (93, 233779), (147, 147901), (217, 100191), (273, 79639), (367, 59241), (403, 53949), (637, 34131), (651, 33397), (1101, 19747), (1209, 17983), (1519, 14313), (1911, 11377), (2569, 8463), (2821, 7707), (4557, 4771)]