20408199

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:140

約数の個数: 64

約数和(自身を含む): 35389440

約数和(自身を除く): 14981241

約数列:

[1, 3, 7, 21, 23, 29, 31, 47, 69, 87, 93, 141, 161, 203, 217, 329, 483, 609, 651, 667, 713, 899, 987, 1081, 1363, 1457, 2001, 2139, 2697, 3243, 4089, 4371, 4669, 4991, 6293, 7567, 9541, 10199, 14007, 14973, 18879, 20677, 22701, 28623, 30597, 31349, 33511, 42253, 62031, 94047, 100533, 126759, 144739, 219443, 234577, 295771, 434217, 658329, 703731, 887313, 971819, 2915457, 6802733, 20408199]

約数ペア:

[(1, 20408199), (3, 6802733), (7, 2915457), (21, 971819), (23, 887313), (29, 703731), (31, 658329), (47, 434217), (69, 295771), (87, 234577), (93, 219443), (141, 144739), (161, 126759), (203, 100533), (217, 94047), (329, 62031), (483, 42253), (609, 33511), (651, 31349), (667, 30597), (713, 28623), (899, 22701), (987, 20677), (1081, 18879), (1363, 14973), (1457, 14007), (2001, 10199), (2139, 9541), (2697, 7567), (3243, 6293), (4089, 4991), (4371, 4669)]