21840325

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 31872960

約数和(自身を除く): 10032635

約数列:

[1, 5, 13, 17, 25, 59, 65, 67, 85, 221, 295, 325, 335, 425, 767, 871, 1003, 1105, 1139, 1475, 1675, 3835, 3953, 4355, 5015, 5525, 5695, 13039, 14807, 19175, 19765, 21775, 25075, 28475, 51389, 65195, 67201, 74035, 98825, 256945, 325975, 336005, 370175, 873613, 1284725, 1680025, 4368065, 21840325]

約数ペア:

[(1, 21840325), (5, 4368065), (13, 1680025), (17, 1284725), (25, 873613), (59, 370175), (65, 336005), (67, 325975), (85, 256945), (221, 98825), (295, 74035), (325, 67201), (335, 65195), (425, 51389), (767, 28475), (871, 25075), (1003, 21775), (1105, 19765), (1139, 19175), (1475, 14807), (1675, 13039), (3835, 5695), (3953, 5525), (4355, 5015)]