19807880

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{389}}^1$

素因数の和:486

約数の個数: 64

約数和(自身を含む): 47736000

約数和(自身を除く): 27928120

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 67, 76, 95, 134, 152, 190, 268, 335, 380, 389, 536, 670, 760, 778, 1273, 1340, 1556, 1945, 2546, 2680, 3112, 3890, 5092, 6365, 7391, 7780, 10184, 12730, 14782, 15560, 25460, 26063, 29564, 36955, 50920, 52126, 59128, 73910, 104252, 130315, 147820, 208504, 260630, 295640, 495197, 521260, 990394, 1042520, 1980788, 2475985, 3961576, 4951970, 9903940, 19807880]

約数ペア:

[(1, 19807880), (2, 9903940), (4, 4951970), (5, 3961576), (8, 2475985), (10, 1980788), (19, 1042520), (20, 990394), (38, 521260), (40, 495197), (67, 295640), (76, 260630), (95, 208504), (134, 147820), (152, 130315), (190, 104252), (268, 73910), (335, 59128), (380, 52126), (389, 50920), (536, 36955), (670, 29564), (760, 26063), (778, 25460), (1273, 15560), (1340, 14782), (1556, 12730), (1945, 10184), (2546, 7780), (2680, 7391), (3112, 6365), (3890, 5092)]