19811480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1229}}^1$

素因数の和:1284

約数の個数: 64

約数和(自身を含む): 49593600

約数和(自身を除く): 29782120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1229, 1240, 1612, 2015, 2458, 3224, 4030, 4916, 6145, 8060, 9832, 12290, 15977, 16120, 24580, 31954, 38099, 49160, 63908, 76198, 79885, 127816, 152396, 159770, 190495, 304792, 319540, 380990, 495287, 639080, 761980, 990574, 1523960, 1981148, 2476435, 3962296, 4952870, 9905740, 19811480]

約数ペア:

[(1, 19811480), (2, 9905740), (4, 4952870), (5, 3962296), (8, 2476435), (10, 1981148), (13, 1523960), (20, 990574), (26, 761980), (31, 639080), (40, 495287), (52, 380990), (62, 319540), (65, 304792), (104, 190495), (124, 159770), (130, 152396), (155, 127816), (248, 79885), (260, 76198), (310, 63908), (403, 49160), (520, 38099), (620, 31954), (806, 24580), (1229, 16120), (1240, 15977), (1612, 12290), (2015, 9832), (2458, 8060), (3224, 6145), (4030, 4916)]