21745725

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 38092800

約数和(自身を除く): 16347075

約数列:

[1, 3, 5, 15, 25, 31, 47, 75, 93, 141, 155, 199, 235, 465, 597, 705, 775, 995, 1175, 1457, 2325, 2985, 3525, 4371, 4975, 6169, 7285, 9353, 14925, 18507, 21855, 28059, 30845, 36425, 46765, 92535, 109275, 140295, 154225, 233825, 289943, 462675, 701475, 869829, 1449715, 4349145, 7248575, 21745725]

約数ペア:

[(1, 21745725), (3, 7248575), (5, 4349145), (15, 1449715), (25, 869829), (31, 701475), (47, 462675), (75, 289943), (93, 233825), (141, 154225), (155, 140295), (199, 109275), (235, 92535), (465, 46765), (597, 36425), (705, 30845), (775, 28059), (995, 21855), (1175, 18507), (1457, 14925), (2325, 9353), (2985, 7285), (3525, 6169), (4371, 4975)]