220166420

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1\times {\mathrm{691}}^1$

素因数の和:968

約数の個数: 48

約数和(自身を含む): 470836800

約数和(自身を除く): 250670380

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 179, 356, 358, 445, 691, 716, 890, 895, 1382, 1780, 1790, 2764, 3455, 3580, 6910, 13820, 15931, 31862, 61499, 63724, 79655, 122998, 123689, 159310, 245996, 247378, 307495, 318620, 494756, 614990, 618445, 1229980, 1236890, 2473780, 11008321, 22016642, 44033284, 55041605, 110083210, 220166420]

約数ペア:

[(1, 220166420), (2, 110083210), (4, 55041605), (5, 44033284), (10, 22016642), (20, 11008321), (89, 2473780), (178, 1236890), (179, 1229980), (356, 618445), (358, 614990), (445, 494756), (691, 318620), (716, 307495), (890, 247378), (895, 245996), (1382, 159310), (1780, 123689), (1790, 122998), (2764, 79655), (3455, 63724), (3580, 61499), (6910, 31862), (13820, 15931)]