19990275

素因数分解:

$3^1\times 5^2\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 34712064

約数和(自身を除く): 14721789

約数列:

[1, 3, 5, 15, 25, 47, 53, 75, 107, 141, 159, 235, 265, 321, 535, 705, 795, 1175, 1325, 1605, 2491, 2675, 3525, 3975, 5029, 5671, 7473, 8025, 12455, 15087, 17013, 25145, 28355, 37365, 62275, 75435, 85065, 125725, 141775, 186825, 266537, 377175, 425325, 799611, 1332685, 3998055, 6663425, 19990275]

約数ペア:

[(1, 19990275), (3, 6663425), (5, 3998055), (15, 1332685), (25, 799611), (47, 425325), (53, 377175), (75, 266537), (107, 186825), (141, 141775), (159, 125725), (235, 85065), (265, 75435), (321, 62275), (535, 37365), (705, 28355), (795, 25145), (1175, 17013), (1325, 15087), (1605, 12455), (2491, 8025), (2675, 7473), (3525, 5671), (3975, 5029)]