21176720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8539}}^1$

素因数の和:8583

約数の個数: 40

約数和(自身を含む): 50830080

約数和(自身を除く): 29653360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8539, 17078, 34156, 42695, 68312, 85390, 136624, 170780, 264709, 341560, 529418, 683120, 1058836, 1323545, 2117672, 2647090, 4235344, 5294180, 10588360, 21176720]

約数ペア:

[(1, 21176720), (2, 10588360), (4, 5294180), (5, 4235344), (8, 2647090), (10, 2117672), (16, 1323545), (20, 1058836), (31, 683120), (40, 529418), (62, 341560), (80, 264709), (124, 170780), (155, 136624), (248, 85390), (310, 68312), (496, 42695), (620, 34156), (1240, 17078), (2480, 8539)]