21512750

素因数分解:

$2^1\times 5^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{647}}^1$

素因数の和:690

約数の個数: 64

約数和(自身を含む): 48522240

約数和(自身を除く): 27009490

約数列:

[1, 2, 5, 7, 10, 14, 19, 25, 35, 38, 50, 70, 95, 125, 133, 175, 190, 250, 266, 350, 475, 647, 665, 875, 950, 1294, 1330, 1750, 2375, 3235, 3325, 4529, 4750, 6470, 6650, 9058, 12293, 16175, 16625, 22645, 24586, 32350, 33250, 45290, 61465, 80875, 86051, 113225, 122930, 161750, 172102, 226450, 307325, 430255, 566125, 614650, 860510, 1132250, 1536625, 2151275, 3073250, 4302550, 10756375, 21512750]

約数ペア:

[(1, 21512750), (2, 10756375), (5, 4302550), (7, 3073250), (10, 2151275), (14, 1536625), (19, 1132250), (25, 860510), (35, 614650), (38, 566125), (50, 430255), (70, 307325), (95, 226450), (125, 172102), (133, 161750), (175, 122930), (190, 113225), (250, 86051), (266, 80875), (350, 61465), (475, 45290), (647, 33250), (665, 32350), (875, 24586), (950, 22645), (1294, 16625), (1330, 16175), (1750, 12293), (2375, 9058), (3235, 6650), (3325, 6470), (4529, 4750)]