21411280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{839}}^1$

素因数の和:892

約数の個数: 80

約数和(自身を含む): 56246400

約数和(自身を除く): 34835120

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 40, 44, 55, 58, 80, 88, 110, 116, 145, 176, 220, 232, 290, 319, 440, 464, 580, 638, 839, 880, 1160, 1276, 1595, 1678, 2320, 2552, 3190, 3356, 4195, 5104, 6380, 6712, 8390, 9229, 12760, 13424, 16780, 18458, 24331, 25520, 33560, 36916, 46145, 48662, 67120, 73832, 92290, 97324, 121655, 147664, 184580, 194648, 243310, 267641, 369160, 389296, 486620, 535282, 738320, 973240, 1070564, 1338205, 1946480, 2141128, 2676410, 4282256, 5352820, 10705640, 21411280]

約数ペア:

[(1, 21411280), (2, 10705640), (4, 5352820), (5, 4282256), (8, 2676410), (10, 2141128), (11, 1946480), (16, 1338205), (20, 1070564), (22, 973240), (29, 738320), (40, 535282), (44, 486620), (55, 389296), (58, 369160), (80, 267641), (88, 243310), (110, 194648), (116, 184580), (145, 147664), (176, 121655), (220, 97324), (232, 92290), (290, 73832), (319, 67120), (440, 48662), (464, 46145), (580, 36916), (638, 33560), (839, 25520), (880, 24331), (1160, 18458), (1276, 16780), (1595, 13424), (1678, 12760), (2320, 9229), (2552, 8390), (3190, 6712), (3356, 6380), (4195, 5104)]