20577990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{257}}^1$

素因数の和:441

約数の個数: 64

約数和(自身を含む): 52830144

約数和(自身を除く): 32252154

約数列:

[1, 2, 3, 5, 6, 10, 15, 17, 30, 34, 51, 85, 102, 157, 170, 255, 257, 314, 471, 510, 514, 771, 785, 942, 1285, 1542, 1570, 2355, 2570, 2669, 3855, 4369, 4710, 5338, 7710, 8007, 8738, 13107, 13345, 16014, 21845, 26214, 26690, 40035, 40349, 43690, 65535, 80070, 80698, 121047, 131070, 201745, 242094, 403490, 605235, 685933, 1210470, 1371866, 2057799, 3429665, 4115598, 6859330, 10288995, 20577990]

約数ペア:

[(1, 20577990), (2, 10288995), (3, 6859330), (5, 4115598), (6, 3429665), (10, 2057799), (15, 1371866), (17, 1210470), (30, 685933), (34, 605235), (51, 403490), (85, 242094), (102, 201745), (157, 131070), (170, 121047), (255, 80698), (257, 80070), (314, 65535), (471, 43690), (510, 40349), (514, 40035), (771, 26690), (785, 26214), (942, 21845), (1285, 16014), (1542, 13345), (1570, 13107), (2355, 8738), (2570, 8007), (2669, 7710), (3855, 5338), (4369, 4710)]