21047535

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:372

約数の個数: 48

約数和(自身を含む): 38937600

約数和(自身を除く): 17890065

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 103, 171, 239, 285, 309, 515, 717, 855, 927, 1195, 1545, 1957, 2151, 3585, 4541, 4635, 5871, 9785, 10755, 13623, 17613, 22705, 24617, 29355, 40869, 68115, 73851, 88065, 123085, 204345, 221553, 369255, 467723, 1107765, 1403169, 2338615, 4209507, 7015845, 21047535]

約数ペア:

[(1, 21047535), (3, 7015845), (5, 4209507), (9, 2338615), (15, 1403169), (19, 1107765), (45, 467723), (57, 369255), (95, 221553), (103, 204345), (171, 123085), (239, 88065), (285, 73851), (309, 68115), (515, 40869), (717, 29355), (855, 24617), (927, 22705), (1195, 17613), (1545, 13623), (1957, 10755), (2151, 9785), (3585, 5871), (4541, 4635)]