20481525

素因数分解:

$3^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{1597}}^1$

素因数の和:1635

約数の個数: 48

約数和(自身を含む): 39630400

約数和(自身を除く): 19148875

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 95, 135, 171, 225, 285, 475, 513, 675, 855, 1425, 1597, 2565, 4275, 4791, 7985, 12825, 14373, 23955, 30343, 39925, 43119, 71865, 91029, 119775, 151715, 215595, 273087, 359325, 455145, 758575, 819261, 1077975, 1365435, 2275725, 4096305, 6827175, 20481525]

約数ペア:

[(1, 20481525), (3, 6827175), (5, 4096305), (9, 2275725), (15, 1365435), (19, 1077975), (25, 819261), (27, 758575), (45, 455145), (57, 359325), (75, 273087), (95, 215595), (135, 151715), (171, 119775), (225, 91029), (285, 71865), (475, 43119), (513, 39925), (675, 30343), (855, 23955), (1425, 14373), (1597, 12825), (2565, 7985), (4275, 4791)]