21163725

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{503}}^1$

素因数の和:547

約数の個数: 72

約数和(自身を含む): 43872192

約数和(自身を除く): 22708467

約数列:

[1, 3, 5, 9, 11, 15, 17, 25, 33, 45, 51, 55, 75, 85, 99, 153, 165, 187, 225, 255, 275, 425, 495, 503, 561, 765, 825, 935, 1275, 1509, 1683, 2475, 2515, 2805, 3825, 4527, 4675, 5533, 7545, 8415, 8551, 12575, 14025, 16599, 22635, 25653, 27665, 37725, 42075, 42755, 49797, 76959, 82995, 94061, 113175, 128265, 138325, 213775, 248985, 282183, 384795, 414975, 470305, 641325, 846549, 1244925, 1410915, 1923975, 2351525, 4232745, 7054575, 21163725]

約数ペア:

[(1, 21163725), (3, 7054575), (5, 4232745), (9, 2351525), (11, 1923975), (15, 1410915), (17, 1244925), (25, 846549), (33, 641325), (45, 470305), (51, 414975), (55, 384795), (75, 282183), (85, 248985), (99, 213775), (153, 138325), (165, 128265), (187, 113175), (225, 94061), (255, 82995), (275, 76959), (425, 49797), (495, 42755), (503, 42075), (561, 37725), (765, 27665), (825, 25653), (935, 22635), (1275, 16599), (1509, 14025), (1683, 12575), (2475, 8551), (2515, 8415), (2805, 7545), (3825, 5533), (4527, 4675)]