21919940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5399}}^1$

素因数の和:5444

約数の個数: 48

約数和(自身を含む): 54432000

約数和(自身を除く): 32512060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 5399, 10798, 21596, 26995, 37793, 53990, 75586, 107980, 151172, 156571, 188965, 313142, 377930, 626284, 755860, 782855, 1095997, 1565710, 2191994, 3131420, 4383988, 5479985, 10959970, 21919940]

約数ペア:

[(1, 21919940), (2, 10959970), (4, 5479985), (5, 4383988), (7, 3131420), (10, 2191994), (14, 1565710), (20, 1095997), (28, 782855), (29, 755860), (35, 626284), (58, 377930), (70, 313142), (116, 188965), (140, 156571), (145, 151172), (203, 107980), (290, 75586), (406, 53990), (580, 37793), (812, 26995), (1015, 21596), (2030, 10798), (4060, 5399)]