17801955

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{443}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 33246720

約数和(自身を除く): 15444765

約数列:

[1, 3, 5, 9, 15, 19, 45, 47, 57, 95, 141, 171, 235, 285, 423, 443, 705, 855, 893, 1329, 2115, 2215, 2679, 3987, 4465, 6645, 8037, 8417, 13395, 19935, 20821, 25251, 40185, 42085, 62463, 75753, 104105, 126255, 187389, 312315, 378765, 395599, 936945, 1186797, 1977995, 3560391, 5933985, 17801955]

約数ペア:

[(1, 17801955), (3, 5933985), (5, 3560391), (9, 1977995), (15, 1186797), (19, 936945), (45, 395599), (47, 378765), (57, 312315), (95, 187389), (141, 126255), (171, 104105), (235, 75753), (285, 62463), (423, 42085), (443, 40185), (705, 25251), (855, 20821), (893, 19935), (1329, 13395), (2115, 8417), (2215, 8037), (2679, 6645), (3987, 4465)]