21294540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{6959}}^1$

素因数の和:6991

約数の個数: 72

約数和(自身を含む): 68402880

約数和(自身を除く): 47108340

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 153, 170, 180, 204, 255, 306, 340, 510, 612, 765, 1020, 1530, 3060, 6959, 13918, 20877, 27836, 34795, 41754, 62631, 69590, 83508, 104385, 118303, 125262, 139180, 208770, 236606, 250524, 313155, 354909, 417540, 473212, 591515, 626310, 709818, 1064727, 1183030, 1252620, 1419636, 1774545, 2129454, 2366060, 3549090, 4258908, 5323635, 7098180, 10647270, 21294540]

約数ペア:

[(1, 21294540), (2, 10647270), (3, 7098180), (4, 5323635), (5, 4258908), (6, 3549090), (9, 2366060), (10, 2129454), (12, 1774545), (15, 1419636), (17, 1252620), (18, 1183030), (20, 1064727), (30, 709818), (34, 626310), (36, 591515), (45, 473212), (51, 417540), (60, 354909), (68, 313155), (85, 250524), (90, 236606), (102, 208770), (153, 139180), (170, 125262), (180, 118303), (204, 104385), (255, 83508), (306, 69590), (340, 62631), (510, 41754), (612, 34795), (765, 27836), (1020, 20877), (1530, 13918), (3060, 6959)]