20686725

素因数分解:

$3^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{1613}}^1$

素因数の和:1651

約数の個数: 48

約数和(自身を含む): 40027200

約数和(自身を除く): 19340475

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 95, 135, 171, 225, 285, 475, 513, 675, 855, 1425, 1613, 2565, 4275, 4839, 8065, 12825, 14517, 24195, 30647, 40325, 43551, 72585, 91941, 120975, 153235, 217755, 275823, 362925, 459705, 766175, 827469, 1088775, 1379115, 2298525, 4137345, 6895575, 20686725]

約数ペア:

[(1, 20686725), (3, 6895575), (5, 4137345), (9, 2298525), (15, 1379115), (19, 1088775), (25, 827469), (27, 766175), (45, 459705), (57, 362925), (75, 275823), (95, 217755), (135, 153235), (171, 120975), (225, 91941), (285, 72585), (475, 43551), (513, 40325), (675, 30647), (855, 24195), (1425, 14517), (1613, 12825), (2565, 8065), (4275, 4839)]