81213885

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^2$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 154920480

約数和(自身を除く): 73706595

約数列:

[1, 3, 5, 9, 15, 19, 43, 45, 47, 57, 95, 129, 141, 171, 215, 235, 285, 387, 423, 645, 705, 817, 855, 893, 1935, 2021, 2115, 2209, 2451, 2679, 4085, 4465, 6063, 6627, 7353, 8037, 10105, 11045, 12255, 13395, 18189, 19881, 30315, 33135, 36765, 38399, 40185, 41971, 90945, 94987, 99405, 115197, 125913, 191995, 209855, 284961, 345591, 377739, 474935, 575985, 629565, 854883, 1424805, 1727955, 1804753, 1888695, 4274415, 5414259, 9023765, 16242777, 27071295, 81213885]

約数ペア:

[(1, 81213885), (3, 27071295), (5, 16242777), (9, 9023765), (15, 5414259), (19, 4274415), (43, 1888695), (45, 1804753), (47, 1727955), (57, 1424805), (95, 854883), (129, 629565), (141, 575985), (171, 474935), (215, 377739), (235, 345591), (285, 284961), (387, 209855), (423, 191995), (645, 125913), (705, 115197), (817, 99405), (855, 94987), (893, 90945), (1935, 41971), (2021, 40185), (2115, 38399), (2209, 36765), (2451, 33135), (2679, 30315), (4085, 19881), (4465, 18189), (6063, 13395), (6627, 12255), (7353, 11045), (8037, 10105)]