20555860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{457}}^1$

素因数の和:652

約数の個数: 48

約数和(自身を含む): 46858896

約数和(自身を除く): 26303036

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 173, 260, 346, 457, 692, 865, 914, 1730, 1828, 2249, 2285, 3460, 4498, 4570, 5941, 8996, 9140, 11245, 11882, 22490, 23764, 29705, 44980, 59410, 79061, 118820, 158122, 316244, 395305, 790610, 1027793, 1581220, 2055586, 4111172, 5138965, 10277930, 20555860]

約数ペア:

[(1, 20555860), (2, 10277930), (4, 5138965), (5, 4111172), (10, 2055586), (13, 1581220), (20, 1027793), (26, 790610), (52, 395305), (65, 316244), (130, 158122), (173, 118820), (260, 79061), (346, 59410), (457, 44980), (692, 29705), (865, 23764), (914, 22490), (1730, 11882), (1828, 11245), (2249, 9140), (2285, 8996), (3460, 5941), (4498, 4570)]