20916225

素因数分解:

$3^5\times 5^2\times {\mathrm{11}}^1\times {\mathrm{313}}^1$

素因数の和:349

約数の個数: 72

約数和(自身を含む): 42518112

約数和(自身を除く): 21601887

約数列:

[1, 3, 5, 9, 11, 15, 25, 27, 33, 45, 55, 75, 81, 99, 135, 165, 225, 243, 275, 297, 313, 405, 495, 675, 825, 891, 939, 1215, 1485, 1565, 2025, 2475, 2673, 2817, 3443, 4455, 4695, 6075, 7425, 7825, 8451, 10329, 13365, 14085, 17215, 22275, 23475, 25353, 30987, 42255, 51645, 66825, 70425, 76059, 86075, 92961, 126765, 154935, 211275, 258225, 278883, 380295, 464805, 633825, 774675, 836649, 1394415, 1901475, 2324025, 4183245, 6972075, 20916225]

約数ペア:

[(1, 20916225), (3, 6972075), (5, 4183245), (9, 2324025), (11, 1901475), (15, 1394415), (25, 836649), (27, 774675), (33, 633825), (45, 464805), (55, 380295), (75, 278883), (81, 258225), (99, 211275), (135, 154935), (165, 126765), (225, 92961), (243, 86075), (275, 76059), (297, 70425), (313, 66825), (405, 51645), (495, 42255), (675, 30987), (825, 25353), (891, 23475), (939, 22275), (1215, 17215), (1485, 14085), (1565, 13365), (2025, 10329), (2475, 8451), (2673, 7825), (2817, 7425), (3443, 6075), (4455, 4695)]