20684631.000000000

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{97571}}^1$

素因数の和:97593

約数の個数: 72

約数和(自身を含む): 426194496

約数和(自身を除く): 303255036

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 97571, 195142, 292713, 390284, 487855, 585426, 682997, 878139, 975710, 1170852, 1365994, 1463565, 1756278, 1951420, 2048991, 2731988, 2927130, 3414985, 3512556, 4097982, 4390695, 5854260, 6146973, 6829970, 8195964, 8781390, 10244955, 12293946, 13659940, 17562780, 20489910, 24587892, 30734865, 40979820, 61469730, 122939460]

約数ペア:

[(1, 122939460), (2, 61469730), (3, 40979820), (4, 30734865), (5, 24587892), (6, 20489910), (7, 17562780), (9, 13659940), (10, 12293946), (12, 10244955), (14, 8781390), (15, 8195964), (18, 6829970), (20, 6146973), (21, 5854260), (28, 4390695), (30, 4097982), (35, 3512556), (36, 3414985), (42, 2927130), (45, 2731988), (60, 2048991), (63, 1951420), (70, 1756278), (84, 1463565), (90, 1365994), (105, 1170852), (126, 975710), (140, 878139), (180, 682997), (210, 585426), (252, 487855), (315, 390284), (420, 292713), (630, 195142), (1260, 97571)]