21565280

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{12253}}^1$

素因数の和:12279

約数の個数: 48

約数和(自身を含む): 55584144

約数和(自身を除く): 34018864

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 12253, 24506, 49012, 61265, 98024, 122530, 134783, 196048, 245060, 269566, 392096, 490120, 539132, 673915, 980240, 1078264, 1347830, 1960480, 2156528, 2695660, 4313056, 5391320, 10782640, 21565280]

約数ペア:

[(1, 21565280), (2, 10782640), (4, 5391320), (5, 4313056), (8, 2695660), (10, 2156528), (11, 1960480), (16, 1347830), (20, 1078264), (22, 980240), (32, 673915), (40, 539132), (44, 490120), (55, 392096), (80, 269566), (88, 245060), (110, 196048), (160, 134783), (176, 122530), (220, 98024), (352, 61265), (440, 49012), (880, 24506), (1760, 12253)]