20161960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{191}}^1$

素因数の和:251

約数の個数: 128

約数和(自身を含む): 58060800

約数和(自身を除く): 37898840

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 29, 35, 40, 52, 56, 58, 65, 70, 91, 104, 116, 130, 140, 145, 182, 191, 203, 232, 260, 280, 290, 364, 377, 382, 406, 455, 520, 580, 728, 754, 764, 812, 910, 955, 1015, 1160, 1337, 1508, 1528, 1624, 1820, 1885, 1910, 2030, 2483, 2639, 2674, 3016, 3640, 3770, 3820, 4060, 4966, 5278, 5348, 5539, 6685, 7540, 7640, 8120, 9932, 10556, 10696, 11078, 12415, 13195, 13370, 15080, 17381, 19864, 21112, 22156, 24830, 26390, 26740, 27695, 34762, 38773, 44312, 49660, 52780, 53480, 55390, 69524, 72007, 77546, 86905, 99320, 105560, 110780, 139048, 144014, 155092, 173810, 193865, 221560, 288028, 310184, 347620, 360035, 387730, 504049, 576056, 695240, 720070, 775460, 1008098, 1440140, 1550920, 2016196, 2520245, 2880280, 4032392, 5040490, 10080980, 20161960]

約数ペア:

[(1, 20161960), (2, 10080980), (4, 5040490), (5, 4032392), (7, 2880280), (8, 2520245), (10, 2016196), (13, 1550920), (14, 1440140), (20, 1008098), (26, 775460), (28, 720070), (29, 695240), (35, 576056), (40, 504049), (52, 387730), (56, 360035), (58, 347620), (65, 310184), (70, 288028), (91, 221560), (104, 193865), (116, 173810), (130, 155092), (140, 144014), (145, 139048), (182, 110780), (191, 105560), (203, 99320), (232, 86905), (260, 77546), (280, 72007), (290, 69524), (364, 55390), (377, 53480), (382, 52780), (406, 49660), (455, 44312), (520, 38773), (580, 34762), (728, 27695), (754, 26740), (764, 26390), (812, 24830), (910, 22156), (955, 21112), (1015, 19864), (1160, 17381), (1337, 15080), (1508, 13370), (1528, 13195), (1624, 12415), (1820, 11078), (1885, 10696), (1910, 10556), (2030, 9932), (2483, 8120), (2639, 7640), (2674, 7540), (3016, 6685), (3640, 5539), (3770, 5348), (3820, 5278), (4060, 4966)]