31530920

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{521}}^1$

素因数の和:638

約数の個数: 64

約数和(自身を含む): 76107600

約数和(自身を除く): 44576680

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 89, 136, 170, 178, 340, 356, 445, 521, 680, 712, 890, 1042, 1513, 1780, 2084, 2605, 3026, 3560, 4168, 5210, 6052, 7565, 8857, 10420, 12104, 15130, 17714, 20840, 30260, 35428, 44285, 46369, 60520, 70856, 88570, 92738, 177140, 185476, 231845, 354280, 370952, 463690, 788273, 927380, 1576546, 1854760, 3153092, 3941365, 6306184, 7882730, 15765460, 31530920]

約数ペア:

[(1, 31530920), (2, 15765460), (4, 7882730), (5, 6306184), (8, 3941365), (10, 3153092), (17, 1854760), (20, 1576546), (34, 927380), (40, 788273), (68, 463690), (85, 370952), (89, 354280), (136, 231845), (170, 185476), (178, 177140), (340, 92738), (356, 88570), (445, 70856), (521, 60520), (680, 46369), (712, 44285), (890, 35428), (1042, 30260), (1513, 20840), (1780, 17714), (2084, 15130), (2605, 12104), (3026, 10420), (3560, 8857), (4168, 7565), (5210, 6052)]