21252280

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{1549}}^1$

素因数の和:1581

約数の個数: 64

約数和(自身を含む): 55800000

約数和(自身を除く): 34547720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1372, 1549, 1715, 1960, 2744, 3098, 3430, 6196, 6860, 7745, 10843, 12392, 13720, 15490, 21686, 30980, 43372, 54215, 61960, 75901, 86744, 108430, 151802, 216860, 303604, 379505, 433720, 531307, 607208, 759010, 1062614, 1518020, 2125228, 2656535, 3036040, 4250456, 5313070, 10626140, 21252280]

約数ペア:

[(1, 21252280), (2, 10626140), (4, 5313070), (5, 4250456), (7, 3036040), (8, 2656535), (10, 2125228), (14, 1518020), (20, 1062614), (28, 759010), (35, 607208), (40, 531307), (49, 433720), (56, 379505), (70, 303604), (98, 216860), (140, 151802), (196, 108430), (245, 86744), (280, 75901), (343, 61960), (392, 54215), (490, 43372), (686, 30980), (980, 21686), (1372, 15490), (1549, 13720), (1715, 12392), (1960, 10843), (2744, 7745), (3098, 6860), (3430, 6196)]