21690090

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{601}}^1$

素因数の和:1015

約数の個数: 48

約数和(自身を含む): 56628936

約数和(自身を除く): 34938846

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 401, 601, 802, 1202, 1203, 1803, 2005, 2406, 3005, 3606, 3609, 4010, 5409, 6010, 6015, 7218, 9015, 10818, 12030, 18030, 18045, 27045, 36090, 54090, 241001, 482002, 723003, 1205005, 1446006, 2169009, 2410010, 3615015, 4338018, 7230030, 10845045, 21690090]

約数ペア:

[(1, 21690090), (2, 10845045), (3, 7230030), (5, 4338018), (6, 3615015), (9, 2410010), (10, 2169009), (15, 1446006), (18, 1205005), (30, 723003), (45, 482002), (90, 241001), (401, 54090), (601, 36090), (802, 27045), (1202, 18045), (1203, 18030), (1803, 12030), (2005, 10818), (2406, 9015), (3005, 7218), (3606, 6015), (3609, 6010), (4010, 5409)]