21947300

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:209

約数の個数: 72

約数和(自身を含む): 50199912

約数和(自身を除く): 28252612

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 53, 82, 100, 101, 106, 164, 202, 205, 212, 265, 404, 410, 505, 530, 820, 1010, 1025, 1060, 1325, 2020, 2050, 2173, 2525, 2650, 4100, 4141, 4346, 5050, 5300, 5353, 8282, 8692, 10100, 10706, 10865, 16564, 20705, 21412, 21730, 26765, 41410, 43460, 53530, 54325, 82820, 103525, 107060, 108650, 133825, 207050, 217300, 219473, 267650, 414100, 438946, 535300, 877892, 1097365, 2194730, 4389460, 5486825, 10973650, 21947300]

約数ペア:

[(1, 21947300), (2, 10973650), (4, 5486825), (5, 4389460), (10, 2194730), (20, 1097365), (25, 877892), (41, 535300), (50, 438946), (53, 414100), (82, 267650), (100, 219473), (101, 217300), (106, 207050), (164, 133825), (202, 108650), (205, 107060), (212, 103525), (265, 82820), (404, 54325), (410, 53530), (505, 43460), (530, 41410), (820, 26765), (1010, 21730), (1025, 21412), (1060, 20705), (1325, 16564), (2020, 10865), (2050, 10706), (2173, 10100), (2525, 8692), (2650, 8282), (4100, 5353), (4141, 5300), (4346, 5050)]