21979720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{3413}}^1$

素因数の和:3454

約数の個数: 64

約数和(自身を含む): 58993920

約数和(自身を除く): 37014200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3220, 3413, 6440, 6826, 13652, 17065, 23891, 27304, 34130, 47782, 68260, 78499, 95564, 119455, 136520, 156998, 191128, 238910, 313996, 392495, 477820, 549493, 627992, 784990, 955640, 1098986, 1569980, 2197972, 2747465, 3139960, 4395944, 5494930, 10989860, 21979720]

約数ペア:

[(1, 21979720), (2, 10989860), (4, 5494930), (5, 4395944), (7, 3139960), (8, 2747465), (10, 2197972), (14, 1569980), (20, 1098986), (23, 955640), (28, 784990), (35, 627992), (40, 549493), (46, 477820), (56, 392495), (70, 313996), (92, 238910), (115, 191128), (140, 156998), (161, 136520), (184, 119455), (230, 95564), (280, 78499), (322, 68260), (460, 47782), (644, 34130), (805, 27304), (920, 23891), (1288, 17065), (1610, 13652), (3220, 6826), (3413, 6440)]