21011880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^2\times {\mathrm{331}}^1$

素因数の和:391

約数の個数: 96

約数和(自身を含む): 66094560

約数和(自身を除く): 45082680

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 40, 46, 60, 69, 92, 115, 120, 138, 184, 230, 276, 331, 345, 460, 529, 552, 662, 690, 920, 993, 1058, 1324, 1380, 1587, 1655, 1986, 2116, 2645, 2648, 2760, 3174, 3310, 3972, 4232, 4965, 5290, 6348, 6620, 7613, 7935, 7944, 9930, 10580, 12696, 13240, 15226, 15870, 19860, 21160, 22839, 30452, 31740, 38065, 39720, 45678, 60904, 63480, 76130, 91356, 114195, 152260, 175099, 182712, 228390, 304520, 350198, 456780, 525297, 700396, 875495, 913560, 1050594, 1400792, 1750990, 2101188, 2626485, 3501980, 4202376, 5252970, 7003960, 10505940, 21011880]

約数ペア:

[(1, 21011880), (2, 10505940), (3, 7003960), (4, 5252970), (5, 4202376), (6, 3501980), (8, 2626485), (10, 2101188), (12, 1750990), (15, 1400792), (20, 1050594), (23, 913560), (24, 875495), (30, 700396), (40, 525297), (46, 456780), (60, 350198), (69, 304520), (92, 228390), (115, 182712), (120, 175099), (138, 152260), (184, 114195), (230, 91356), (276, 76130), (331, 63480), (345, 60904), (460, 45678), (529, 39720), (552, 38065), (662, 31740), (690, 30452), (920, 22839), (993, 21160), (1058, 19860), (1324, 15870), (1380, 15226), (1587, 13240), (1655, 12696), (1986, 10580), (2116, 9930), (2645, 7944), (2648, 7935), (2760, 7613), (3174, 6620), (3310, 6348), (3972, 5290), (4232, 4965)]