19975160

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1$

素因数の和:312

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 27199240

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 89, 124, 155, 178, 181, 248, 310, 356, 362, 445, 620, 712, 724, 890, 905, 1240, 1448, 1780, 1810, 2759, 3560, 3620, 5518, 5611, 7240, 11036, 11222, 13795, 16109, 22072, 22444, 27590, 28055, 32218, 44888, 55180, 56110, 64436, 80545, 110360, 112220, 128872, 161090, 224440, 322180, 499379, 644360, 998758, 1997516, 2496895, 3995032, 4993790, 9987580, 19975160]

約数ペア:

[(1, 19975160), (2, 9987580), (4, 4993790), (5, 3995032), (8, 2496895), (10, 1997516), (20, 998758), (31, 644360), (40, 499379), (62, 322180), (89, 224440), (124, 161090), (155, 128872), (178, 112220), (181, 110360), (248, 80545), (310, 64436), (356, 56110), (362, 55180), (445, 44888), (620, 32218), (712, 28055), (724, 27590), (890, 22444), (905, 22072), (1240, 16109), (1448, 13795), (1780, 11222), (1810, 11036), (2759, 7240), (3560, 5611), (3620, 5518)]