19900920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{12757}}^1$

素因数の和:12784

約数の個数: 64

約数和(自身を含む): 64300320

約数和(自身を除く): 44399400

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, 12757, 25514, 38271, 51028, 63785, 76542, 102056, 127570, 153084, 165841, 191355, 255140, 306168, 331682, 382710, 497523, 510280, 663364, 765420, 829205, 995046, 1326728, 1530840, 1658410, 1990092, 2487615, 3316820, 3980184, 4975230, 6633640, 9950460, 19900920]

約数ペア:

[(1, 19900920), (2, 9950460), (3, 6633640), (4, 4975230), (5, 3980184), (6, 3316820), (8, 2487615), (10, 1990092), (12, 1658410), (13, 1530840), (15, 1326728), (20, 995046), (24, 829205), (26, 765420), (30, 663364), (39, 510280), (40, 497523), (52, 382710), (60, 331682), (65, 306168), (78, 255140), (104, 191355), (120, 165841), (130, 153084), (156, 127570), (195, 102056), (260, 76542), (312, 63785), (390, 51028), (520, 38271), (780, 25514), (1560, 12757)]