19972040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2389}}^1$

素因数の和:2430

約数の個数: 64

約数和(自身を含む): 51624000

約数和(自身を除く): 31651960

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 152, 190, 209, 220, 380, 418, 440, 760, 836, 1045, 1672, 2090, 2389, 4180, 4778, 8360, 9556, 11945, 19112, 23890, 26279, 45391, 47780, 52558, 90782, 95560, 105116, 131395, 181564, 210232, 226955, 262790, 363128, 453910, 499301, 525580, 907820, 998602, 1051160, 1815640, 1997204, 2496505, 3994408, 4993010, 9986020, 19972040]

約数ペア:

[(1, 19972040), (2, 9986020), (4, 4993010), (5, 3994408), (8, 2496505), (10, 1997204), (11, 1815640), (19, 1051160), (20, 998602), (22, 907820), (38, 525580), (40, 499301), (44, 453910), (55, 363128), (76, 262790), (88, 226955), (95, 210232), (110, 181564), (152, 131395), (190, 105116), (209, 95560), (220, 90782), (380, 52558), (418, 47780), (440, 45391), (760, 26279), (836, 23890), (1045, 19112), (1672, 11945), (2090, 9556), (2389, 8360), (4180, 4778)]