20559760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{373}}^1$

素因数の和:452

約数の個数: 80

約数和(自身を含む): 52590384

約数和(自身を除く): 32030624

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 53, 65, 80, 104, 106, 130, 208, 212, 260, 265, 373, 424, 520, 530, 689, 746, 848, 1040, 1060, 1378, 1492, 1865, 2120, 2756, 2984, 3445, 3730, 4240, 4849, 5512, 5968, 6890, 7460, 9698, 11024, 13780, 14920, 19396, 19769, 24245, 27560, 29840, 38792, 39538, 48490, 55120, 77584, 79076, 96980, 98845, 158152, 193960, 197690, 256997, 316304, 387920, 395380, 513994, 790760, 1027988, 1284985, 1581520, 2055976, 2569970, 4111952, 5139940, 10279880, 20559760]

約数ペア:

[(1, 20559760), (2, 10279880), (4, 5139940), (5, 4111952), (8, 2569970), (10, 2055976), (13, 1581520), (16, 1284985), (20, 1027988), (26, 790760), (40, 513994), (52, 395380), (53, 387920), (65, 316304), (80, 256997), (104, 197690), (106, 193960), (130, 158152), (208, 98845), (212, 96980), (260, 79076), (265, 77584), (373, 55120), (424, 48490), (520, 39538), (530, 38792), (689, 29840), (746, 27560), (848, 24245), (1040, 19769), (1060, 19396), (1378, 14920), (1492, 13780), (1865, 11024), (2120, 9698), (2756, 7460), (2984, 6890), (3445, 5968), (3730, 5512), (4240, 4849)]