20665400

素因数分解:

$2^3\times 5^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{509}}^1$

素因数の和:561

約数の個数: 96

約数和(自身を含む): 56916000

約数和(自身を除く): 36250600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 29, 35, 40, 50, 56, 58, 70, 100, 116, 140, 145, 175, 200, 203, 232, 280, 290, 350, 406, 509, 580, 700, 725, 812, 1015, 1018, 1160, 1400, 1450, 1624, 2030, 2036, 2545, 2900, 3563, 4060, 4072, 5075, 5090, 5800, 7126, 8120, 10150, 10180, 12725, 14252, 14761, 17815, 20300, 20360, 25450, 28504, 29522, 35630, 40600, 50900, 59044, 71260, 73805, 89075, 101800, 103327, 118088, 142520, 147610, 178150, 206654, 295220, 356300, 369025, 413308, 516635, 590440, 712600, 738050, 826616, 1033270, 1476100, 2066540, 2583175, 2952200, 4133080, 5166350, 10332700, 20665400]

約数ペア:

[(1, 20665400), (2, 10332700), (4, 5166350), (5, 4133080), (7, 2952200), (8, 2583175), (10, 2066540), (14, 1476100), (20, 1033270), (25, 826616), (28, 738050), (29, 712600), (35, 590440), (40, 516635), (50, 413308), (56, 369025), (58, 356300), (70, 295220), (100, 206654), (116, 178150), (140, 147610), (145, 142520), (175, 118088), (200, 103327), (203, 101800), (232, 89075), (280, 73805), (290, 71260), (350, 59044), (406, 50900), (509, 40600), (580, 35630), (700, 29522), (725, 28504), (812, 25450), (1015, 20360), (1018, 20300), (1160, 17815), (1400, 14761), (1450, 14252), (1624, 12725), (2030, 10180), (2036, 10150), (2545, 8120), (2900, 7126), (3563, 5800), (4060, 5090), (4072, 5075)]