177720921

素因数分解:

$3^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{137}}^1\times {\mathrm{349}}^1$

素因数の和:558

約数の個数: 48

約数和(自身を含む): 301392000

約数和(自身を除く): 123671079

約数列:

[1, 3, 7, 9, 21, 59, 63, 137, 177, 349, 411, 413, 531, 959, 1047, 1233, 1239, 2443, 2877, 3141, 3717, 7329, 8083, 8631, 20591, 21987, 24249, 47813, 56581, 61773, 72747, 143439, 144137, 169743, 185319, 334691, 430317, 432411, 509229, 1004073, 1297233, 2820967, 3012219, 8462901, 19746769, 25388703, 59240307, 177720921]

約数ペア:

[(1, 177720921), (3, 59240307), (7, 25388703), (9, 19746769), (21, 8462901), (59, 3012219), (63, 2820967), (137, 1297233), (177, 1004073), (349, 509229), (411, 432411), (413, 430317), (531, 334691), (959, 185319), (1047, 169743), (1233, 144137), (1239, 143439), (2443, 72747), (2877, 61773), (3141, 56581), (3717, 47813), (7329, 24249), (8083, 21987), (8631, 20591)]