640665870

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{647}}^1\times {\mathrm{2539}}^1$

素因数の和:3209

約数の個数: 64

約数和(自身を含む): 1659087360

約数和(自身を除く): 1018421490

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 647, 1294, 1941, 2539, 3235, 3882, 5078, 6470, 7617, 8411, 9705, 12695, 15234, 16822, 19410, 25233, 25390, 33007, 38085, 42055, 50466, 66014, 76170, 84110, 99021, 126165, 165035, 198042, 252330, 330070, 495105, 990210, 1642733, 3285466, 4928199, 8213665, 9856398, 16427330, 21355529, 24640995, 42711058, 49281990, 64066587, 106777645, 128133174, 213555290, 320332935, 640665870]

約数ペア:

[(1, 640665870), (2, 320332935), (3, 213555290), (5, 128133174), (6, 106777645), (10, 64066587), (13, 49281990), (15, 42711058), (26, 24640995), (30, 21355529), (39, 16427330), (65, 9856398), (78, 8213665), (130, 4928199), (195, 3285466), (390, 1642733), (647, 990210), (1294, 495105), (1941, 330070), (2539, 252330), (3235, 198042), (3882, 165035), (5078, 126165), (6470, 99021), (7617, 84110), (8411, 76170), (9705, 66014), (12695, 50466), (15234, 42055), (16822, 38085), (19410, 33007), (25233, 25390)]