21820700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{239}}^1$

素因数の和:347

約数の個数: 72

約数和(自身を含む): 52496640

約数和(自身を除く): 30675940

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 83, 100, 110, 166, 220, 239, 275, 332, 415, 478, 550, 830, 913, 956, 1100, 1195, 1660, 1826, 2075, 2390, 2629, 3652, 4150, 4565, 4780, 5258, 5975, 8300, 9130, 10516, 11950, 13145, 18260, 19837, 22825, 23900, 26290, 39674, 45650, 52580, 65725, 79348, 91300, 99185, 131450, 198370, 218207, 262900, 396740, 436414, 495925, 872828, 991850, 1091035, 1983700, 2182070, 4364140, 5455175, 10910350, 21820700]

約数ペア:

[(1, 21820700), (2, 10910350), (4, 5455175), (5, 4364140), (10, 2182070), (11, 1983700), (20, 1091035), (22, 991850), (25, 872828), (44, 495925), (50, 436414), (55, 396740), (83, 262900), (100, 218207), (110, 198370), (166, 131450), (220, 99185), (239, 91300), (275, 79348), (332, 65725), (415, 52580), (478, 45650), (550, 39674), (830, 26290), (913, 23900), (956, 22825), (1100, 19837), (1195, 18260), (1660, 13145), (1826, 11950), (2075, 10516), (2390, 9130), (2629, 8300), (3652, 5975), (4150, 5258), (4565, 4780)]