21384540

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{199}}^2$

素因数の和:416

約数の個数: 72

約数和(自身を含む): 66865680

約数和(自身を除く): 45481140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 199, 270, 398, 540, 597, 796, 995, 1194, 1791, 1990, 2388, 2985, 3582, 3980, 5373, 5970, 7164, 8955, 10746, 11940, 17910, 21492, 26865, 35820, 39601, 53730, 79202, 107460, 118803, 158404, 198005, 237606, 356409, 396010, 475212, 594015, 712818, 792020, 1069227, 1188030, 1425636, 1782045, 2138454, 2376060, 3564090, 4276908, 5346135, 7128180, 10692270, 21384540]

約数ペア:

[(1, 21384540), (2, 10692270), (3, 7128180), (4, 5346135), (5, 4276908), (6, 3564090), (9, 2376060), (10, 2138454), (12, 1782045), (15, 1425636), (18, 1188030), (20, 1069227), (27, 792020), (30, 712818), (36, 594015), (45, 475212), (54, 396010), (60, 356409), (90, 237606), (108, 198005), (135, 158404), (180, 118803), (199, 107460), (270, 79202), (398, 53730), (540, 39601), (597, 35820), (796, 26865), (995, 21492), (1194, 17910), (1791, 11940), (1990, 10746), (2388, 8955), (2985, 7164), (3582, 5970), (3980, 5373)]