18688875

素因数分解:

$3^1\times 5^3\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:141

約数の個数: 64

約数和(自身を含む): 34045440

約数和(自身を除く): 15356565

約数列:

[1, 3, 5, 15, 19, 25, 43, 57, 61, 75, 95, 125, 129, 183, 215, 285, 305, 375, 475, 645, 817, 915, 1075, 1159, 1425, 1525, 2375, 2451, 2623, 3225, 3477, 4085, 4575, 5375, 5795, 7125, 7625, 7869, 12255, 13115, 16125, 17385, 20425, 22875, 28975, 39345, 49837, 61275, 65575, 86925, 102125, 144875, 149511, 196725, 249185, 306375, 327875, 434625, 747555, 983625, 1245925, 3737775, 6229625, 18688875]

約数ペア:

[(1, 18688875), (3, 6229625), (5, 3737775), (15, 1245925), (19, 983625), (25, 747555), (43, 434625), (57, 327875), (61, 306375), (75, 249185), (95, 196725), (125, 149511), (129, 144875), (183, 102125), (215, 86925), (285, 65575), (305, 61275), (375, 49837), (475, 39345), (645, 28975), (817, 22875), (915, 20425), (1075, 17385), (1159, 16125), (1425, 13115), (1525, 12255), (2375, 7869), (2451, 7625), (2623, 7125), (3225, 5795), (3477, 5375), (4085, 4575)]