21163980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20749}}^1$

素因数の和:20778

約数の個数: 48

約数和(自身を含む): 62748000

約数和(自身を除く): 41584020

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 20749, 41498, 62247, 82996, 103745, 124494, 207490, 248988, 311235, 352733, 414980, 622470, 705466, 1058199, 1244940, 1410932, 1763665, 2116398, 3527330, 4232796, 5290995, 7054660, 10581990, 21163980]

約数ペア:

[(1, 21163980), (2, 10581990), (3, 7054660), (4, 5290995), (5, 4232796), (6, 3527330), (10, 2116398), (12, 1763665), (15, 1410932), (17, 1244940), (20, 1058199), (30, 705466), (34, 622470), (51, 414980), (60, 352733), (68, 311235), (85, 248988), (102, 207490), (170, 124494), (204, 103745), (255, 82996), (340, 62247), (510, 41498), (1020, 20749)]