21220280800

素因数分解:

$2^5\times 5^2\times {\mathrm{2039}}^1\times {\mathrm{13009}}^1$

素因数の和:15068

約数の個数: 72

約数和(自身を含む): 51833401200

約数和(自身を除く): 30613120400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800, 2039, 4078, 8156, 10195, 13009, 16312, 20390, 26018, 32624, 40780, 50975, 52036, 65045, 65248, 81560, 101950, 104072, 130090, 163120, 203900, 208144, 260180, 325225, 326240, 407800, 416288, 520360, 650450, 815600, 1040720, 1300900, 1631200, 2081440, 2601800, 5203600, 10407200, 26525351, 53050702, 106101404, 132626755, 212202808, 265253510, 424405616, 530507020, 663133775, 848811232, 1061014040, 1326267550, 2122028080, 2652535100, 4244056160, 5305070200, 10610140400, 21220280800]

約数ペア:

[(1, 21220280800), (2, 10610140400), (4, 5305070200), (5, 4244056160), (8, 2652535100), (10, 2122028080), (16, 1326267550), (20, 1061014040), (25, 848811232), (32, 663133775), (40, 530507020), (50, 424405616), (80, 265253510), (100, 212202808), (160, 132626755), (200, 106101404), (400, 53050702), (800, 26525351), (2039, 10407200), (4078, 5203600), (8156, 2601800), (10195, 2081440), (13009, 1631200), (16312, 1300900), (20390, 1040720), (26018, 815600), (32624, 650450), (40780, 520360), (50975, 416288), (52036, 407800), (65045, 326240), (65248, 325225), (81560, 260180), (101950, 208144), (104072, 203900), (130090, 163120)]