21567160

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8839}}^1$

素因数の和:8911

約数の個数: 32

約数和(自身を含む): 49327200

約数和(自身を除く): 27760040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8839, 17678, 35356, 44195, 70712, 88390, 176780, 353560, 539179, 1078358, 2156716, 2695895, 4313432, 5391790, 10783580, 21567160]

約数ペア:

[(1, 21567160), (2, 10783580), (4, 5391790), (5, 4313432), (8, 2695895), (10, 2156716), (20, 1078358), (40, 539179), (61, 353560), (122, 176780), (244, 88390), (305, 70712), (488, 44195), (610, 35356), (1220, 17678), (2440, 8839)]