21465640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2473}}^1$

素因数の和:2522

約数の個数: 64

約数和(自身を含む): 57000960

約数和(自身を除く): 35535320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2473, 4340, 4946, 8680, 9892, 12365, 17311, 19784, 24730, 34622, 49460, 69244, 76663, 86555, 98920, 138488, 153326, 173110, 306652, 346220, 383315, 536641, 613304, 692440, 766630, 1073282, 1533260, 2146564, 2683205, 3066520, 4293128, 5366410, 10732820, 21465640]

約数ペア:

[(1, 21465640), (2, 10732820), (4, 5366410), (5, 4293128), (7, 3066520), (8, 2683205), (10, 2146564), (14, 1533260), (20, 1073282), (28, 766630), (31, 692440), (35, 613304), (40, 536641), (56, 383315), (62, 346220), (70, 306652), (124, 173110), (140, 153326), (155, 138488), (217, 98920), (248, 86555), (280, 76663), (310, 69244), (434, 49460), (620, 34622), (868, 24730), (1085, 19784), (1240, 17311), (1736, 12365), (2170, 9892), (2473, 8680), (4340, 4946)]