21905163

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{181}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 38840256

約数和(自身を除く): 16935093

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 113, 119, 153, 181, 339, 357, 543, 791, 1017, 1071, 1267, 1629, 1921, 2373, 3077, 3801, 5763, 7119, 9231, 11403, 13447, 17289, 20453, 21539, 27693, 40341, 61359, 64617, 121023, 143171, 184077, 193851, 347701, 429513, 1043103, 1288539, 2433907, 3129309, 7301721, 21905163]

約数ペア:

[(1, 21905163), (3, 7301721), (7, 3129309), (9, 2433907), (17, 1288539), (21, 1043103), (51, 429513), (63, 347701), (113, 193851), (119, 184077), (153, 143171), (181, 121023), (339, 64617), (357, 61359), (543, 40341), (791, 27693), (1017, 21539), (1071, 20453), (1267, 17289), (1629, 13447), (1921, 11403), (2373, 9231), (3077, 7119), (3801, 5763)]