21333725

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 32783616

約数和(自身を除く): 11449891

約数列:

[1, 5, 7, 17, 25, 35, 71, 85, 101, 119, 175, 355, 425, 497, 505, 595, 707, 1207, 1717, 1775, 2485, 2525, 2975, 3535, 6035, 7171, 8449, 8585, 12019, 12425, 17675, 30175, 35855, 42245, 42925, 50197, 60095, 121907, 179275, 211225, 250985, 300475, 609535, 853349, 1254925, 3047675, 4266745, 21333725]

約数ペア:

[(1, 21333725), (5, 4266745), (7, 3047675), (17, 1254925), (25, 853349), (35, 609535), (71, 300475), (85, 250985), (101, 211225), (119, 179275), (175, 121907), (355, 60095), (425, 50197), (497, 42925), (505, 42245), (595, 35855), (707, 30175), (1207, 17675), (1717, 12425), (1775, 12019), (2485, 8585), (2525, 8449), (2975, 7171), (3535, 6035)]