21300975

素因数分解:

$3^4\times 5^2\times {\mathrm{67}}^1\times {\mathrm{157}}^1$

素因数の和:246

約数の個数: 60

約数和(自身を含む): 40300744

約数和(自身を除く): 18999769

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 67, 75, 81, 135, 157, 201, 225, 335, 405, 471, 603, 675, 785, 1005, 1413, 1675, 1809, 2025, 2355, 3015, 3925, 4239, 5025, 5427, 7065, 9045, 10519, 11775, 12717, 15075, 21195, 27135, 31557, 35325, 45225, 52595, 63585, 94671, 105975, 135675, 157785, 262975, 284013, 317925, 473355, 788925, 852039, 1420065, 2366775, 4260195, 7100325, 21300975]

約数ペア:

[(1, 21300975), (3, 7100325), (5, 4260195), (9, 2366775), (15, 1420065), (25, 852039), (27, 788925), (45, 473355), (67, 317925), (75, 284013), (81, 262975), (135, 157785), (157, 135675), (201, 105975), (225, 94671), (335, 63585), (405, 52595), (471, 45225), (603, 35325), (675, 31557), (785, 27135), (1005, 21195), (1413, 15075), (1675, 12717), (1809, 11775), (2025, 10519), (2355, 9045), (3015, 7065), (3925, 5427), (4239, 5025)]