31990920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20507}}^1$

素因数の和:20534

約数の個数: 64

約数和(自身を含む): 103360320

約数和(自身を除く): 71369400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 20507, 41014, 61521, 82028, 102535, 123042, 164056, 205070, 246084, 266591, 307605, 410140, 492168, 533182, 615210, 799773, 820280, 1066364, 1230420, 1332955, 1599546, 2132728, 2460840, 2665910, 3199092, 3998865, 5331820, 6398184, 7997730, 10663640, 15995460, 31990920]

約数ペア:

[(1, 31990920), (2, 15995460), (3, 10663640), (4, 7997730), (5, 6398184), (6, 5331820), (8, 3998865), (10, 3199092), (12, 2665910), (13, 2460840), (15, 2132728), (20, 1599546), (24, 1332955), (26, 1230420), (30, 1066364), (39, 820280), (40, 799773), (52, 615210), (60, 533182), (65, 492168), (78, 410140), (104, 307605), (120, 266591), (130, 246084), (156, 205070), (195, 164056), (260, 123042), (312, 102535), (390, 82028), (520, 61521), (780, 41014), (1560, 20507)]