21277625

素因数分解:

$5^3\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:99

約数の個数: 48

約数和(自身を含む): 30650880

約数和(自身を除く): 9373255

約数列:

[1, 5, 17, 19, 25, 31, 85, 95, 125, 155, 289, 323, 425, 475, 527, 589, 775, 1445, 1615, 2125, 2375, 2635, 2945, 3875, 5491, 7225, 8075, 8959, 10013, 13175, 14725, 27455, 36125, 40375, 44795, 50065, 65875, 73625, 137275, 170221, 223975, 250325, 686375, 851105, 1119875, 1251625, 4255525, 21277625]

約数ペア:

[(1, 21277625), (5, 4255525), (17, 1251625), (19, 1119875), (25, 851105), (31, 686375), (85, 250325), (95, 223975), (125, 170221), (155, 137275), (289, 73625), (323, 65875), (425, 50065), (475, 44795), (527, 40375), (589, 36125), (775, 27455), (1445, 14725), (1615, 13175), (2125, 10013), (2375, 8959), (2635, 8075), (2945, 7225), (3875, 5491)]