20857473

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^2\times {\mathrm{653}}^1$

素因数の和:695

約数の個数: 48

約数和(自身を含む): 38298240

約数和(自身を除く): 17440767

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 169, 189, 273, 351, 507, 653, 819, 1183, 1521, 1959, 2457, 3549, 4563, 4571, 5877, 8489, 10647, 13713, 17631, 25467, 31941, 41139, 59423, 76401, 110357, 123417, 178269, 229203, 331071, 534807, 772499, 993213, 1604421, 2317497, 2979639, 6952491, 20857473]

約数ペア:

[(1, 20857473), (3, 6952491), (7, 2979639), (9, 2317497), (13, 1604421), (21, 993213), (27, 772499), (39, 534807), (63, 331071), (91, 229203), (117, 178269), (169, 123417), (189, 110357), (273, 76401), (351, 59423), (507, 41139), (653, 31941), (819, 25467), (1183, 17631), (1521, 13713), (1959, 10647), (2457, 8489), (3549, 5877), (4563, 4571)]