21039570

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1489}}^1$

素因数の和:1659

約数の個数: 48

約数和(自身を含む): 55088280

約数和(自身を除く): 34048710

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 157, 314, 471, 785, 942, 1413, 1489, 1570, 2355, 2826, 2978, 4467, 4710, 7065, 7445, 8934, 13401, 14130, 14890, 22335, 26802, 44670, 67005, 134010, 233773, 467546, 701319, 1168865, 1402638, 2103957, 2337730, 3506595, 4207914, 7013190, 10519785, 21039570]

約数ペア:

[(1, 21039570), (2, 10519785), (3, 7013190), (5, 4207914), (6, 3506595), (9, 2337730), (10, 2103957), (15, 1402638), (18, 1168865), (30, 701319), (45, 467546), (90, 233773), (157, 134010), (314, 67005), (471, 44670), (785, 26802), (942, 22335), (1413, 14890), (1489, 14130), (1570, 13401), (2355, 8934), (2826, 7445), (2978, 7065), (4467, 4710)]