20515180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:239

約数の個数: 96

約数和(自身を含む): 52899840

約数和(自身を除く): 32384660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 31, 35, 58, 62, 70, 116, 124, 140, 145, 155, 163, 203, 217, 290, 310, 326, 406, 434, 580, 620, 652, 812, 815, 868, 899, 1015, 1085, 1141, 1630, 1798, 2030, 2170, 2282, 3260, 3596, 4060, 4340, 4495, 4564, 4727, 5053, 5705, 6293, 8990, 9454, 10106, 11410, 12586, 17980, 18908, 20212, 22820, 23635, 25172, 25265, 31465, 33089, 35371, 47270, 50530, 62930, 66178, 70742, 94540, 101060, 125860, 132356, 141484, 146537, 165445, 176855, 293074, 330890, 353710, 586148, 661780, 707420, 732685, 1025759, 1465370, 2051518, 2930740, 4103036, 5128795, 10257590, 20515180]

約数ペア:

[(1, 20515180), (2, 10257590), (4, 5128795), (5, 4103036), (7, 2930740), (10, 2051518), (14, 1465370), (20, 1025759), (28, 732685), (29, 707420), (31, 661780), (35, 586148), (58, 353710), (62, 330890), (70, 293074), (116, 176855), (124, 165445), (140, 146537), (145, 141484), (155, 132356), (163, 125860), (203, 101060), (217, 94540), (290, 70742), (310, 66178), (326, 62930), (406, 50530), (434, 47270), (580, 35371), (620, 33089), (652, 31465), (812, 25265), (815, 25172), (868, 23635), (899, 22820), (1015, 20212), (1085, 18908), (1141, 17980), (1630, 12586), (1798, 11410), (2030, 10106), (2170, 9454), (2282, 8990), (3260, 6293), (3596, 5705), (4060, 5053), (4340, 4727), (4495, 4564)]