81131990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{3203}}^1$

素因数の和:3376

約数の個数: 32

約数和(自身を含む): 155714400

約数和(自身を除く): 74582410

約数列:

[1, 2, 5, 10, 17, 34, 85, 149, 170, 298, 745, 1490, 2533, 3203, 5066, 6406, 12665, 16015, 25330, 32030, 54451, 108902, 272255, 477247, 544510, 954494, 2386235, 4772470, 8113199, 16226398, 40565995, 81131990]

約数ペア:

[(1, 81131990), (2, 40565995), (5, 16226398), (10, 8113199), (17, 4772470), (34, 2386235), (85, 954494), (149, 544510), (170, 477247), (298, 272255), (745, 108902), (1490, 54451), (2533, 32030), (3203, 25330), (5066, 16015), (6406, 12665)]