20721402

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{5209}}^1$

素因数の和:5247

約数の個数: 48

約数和(自身を含む): 51203880

約数和(自身を除く): 30482478

約数列:

[1, 2, 3, 6, 9, 13, 17, 18, 26, 34, 39, 51, 78, 102, 117, 153, 221, 234, 306, 442, 663, 1326, 1989, 3978, 5209, 10418, 15627, 31254, 46881, 67717, 88553, 93762, 135434, 177106, 203151, 265659, 406302, 531318, 609453, 796977, 1151189, 1218906, 1593954, 2302378, 3453567, 6907134, 10360701, 20721402]

約数ペア:

[(1, 20721402), (2, 10360701), (3, 6907134), (6, 3453567), (9, 2302378), (13, 1593954), (17, 1218906), (18, 1151189), (26, 796977), (34, 609453), (39, 531318), (51, 406302), (78, 265659), (102, 203151), (117, 177106), (153, 135434), (221, 93762), (234, 88553), (306, 67717), (442, 46881), (663, 31254), (1326, 15627), (1989, 10418), (3978, 5209)]