19890900

素因数分解:

$2^2\times 3^3\times 5^2\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:215

約数の個数: 144

約数和(自身を含む): 65620800

約数和(自身を除く): 45729900

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 27, 30, 36, 45, 50, 53, 54, 60, 75, 90, 100, 106, 108, 135, 139, 150, 159, 180, 212, 225, 265, 270, 278, 300, 318, 417, 450, 477, 530, 540, 556, 636, 675, 695, 795, 834, 900, 954, 1060, 1251, 1325, 1350, 1390, 1431, 1590, 1668, 1908, 2085, 2385, 2502, 2650, 2700, 2780, 2862, 3180, 3475, 3753, 3975, 4170, 4770, 5004, 5300, 5724, 6255, 6950, 7155, 7367, 7506, 7950, 8340, 9540, 10425, 11925, 12510, 13900, 14310, 14734, 15012, 15900, 18765, 20850, 22101, 23850, 25020, 28620, 29468, 31275, 35775, 36835, 37530, 41700, 44202, 47700, 62550, 66303, 71550, 73670, 75060, 88404, 93825, 110505, 125100, 132606, 143100, 147340, 184175, 187650, 198909, 221010, 265212, 331515, 368350, 375300, 397818, 442020, 552525, 663030, 736700, 795636, 994545, 1105050, 1326060, 1657575, 1989090, 2210100, 3315150, 3978180, 4972725, 6630300, 9945450, 19890900]

約数ペア:

[(1, 19890900), (2, 9945450), (3, 6630300), (4, 4972725), (5, 3978180), (6, 3315150), (9, 2210100), (10, 1989090), (12, 1657575), (15, 1326060), (18, 1105050), (20, 994545), (25, 795636), (27, 736700), (30, 663030), (36, 552525), (45, 442020), (50, 397818), (53, 375300), (54, 368350), (60, 331515), (75, 265212), (90, 221010), (100, 198909), (106, 187650), (108, 184175), (135, 147340), (139, 143100), (150, 132606), (159, 125100), (180, 110505), (212, 93825), (225, 88404), (265, 75060), (270, 73670), (278, 71550), (300, 66303), (318, 62550), (417, 47700), (450, 44202), (477, 41700), (530, 37530), (540, 36835), (556, 35775), (636, 31275), (675, 29468), (695, 28620), (795, 25020), (834, 23850), (900, 22101), (954, 20850), (1060, 18765), (1251, 15900), (1325, 15012), (1350, 14734), (1390, 14310), (1431, 13900), (1590, 12510), (1668, 11925), (1908, 10425), (2085, 9540), (2385, 8340), (2502, 7950), (2650, 7506), (2700, 7367), (2780, 7155), (2862, 6950), (3180, 6255), (3475, 5724), (3753, 5300), (3975, 5004), (4170, 4770)]