205720840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{3917}}^1$

素因数の和:4042

約数の個数: 64

約数和(自身を含む): 503541360

約数和(自身を除く): 297820520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 101, 104, 130, 202, 260, 404, 505, 520, 808, 1010, 1313, 2020, 2626, 3917, 4040, 5252, 6565, 7834, 10504, 13130, 15668, 19585, 26260, 31336, 39170, 50921, 52520, 78340, 101842, 156680, 203684, 254605, 395617, 407368, 509210, 791234, 1018420, 1582468, 1978085, 2036840, 3164936, 3956170, 5143021, 7912340, 10286042, 15824680, 20572084, 25715105, 41144168, 51430210, 102860420, 205720840]

約数ペア:

[(1, 205720840), (2, 102860420), (4, 51430210), (5, 41144168), (8, 25715105), (10, 20572084), (13, 15824680), (20, 10286042), (26, 7912340), (40, 5143021), (52, 3956170), (65, 3164936), (101, 2036840), (104, 1978085), (130, 1582468), (202, 1018420), (260, 791234), (404, 509210), (505, 407368), (520, 395617), (808, 254605), (1010, 203684), (1313, 156680), (2020, 101842), (2626, 78340), (3917, 52520), (4040, 50921), (5252, 39170), (6565, 31336), (7834, 26260), (10504, 19585), (13130, 15668)]