19721000

素因数分解:

$2^3\times 5^3\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:112

約数の個数: 128

約数和(自身を含む): 52284960

約数和(自身を除く): 32563960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 37, 40, 41, 50, 52, 65, 74, 82, 100, 104, 125, 130, 148, 164, 185, 200, 205, 250, 260, 296, 325, 328, 370, 410, 481, 500, 520, 533, 650, 740, 820, 925, 962, 1000, 1025, 1066, 1300, 1480, 1517, 1625, 1640, 1850, 1924, 2050, 2132, 2405, 2600, 2665, 3034, 3250, 3700, 3848, 4100, 4264, 4625, 4810, 5125, 5330, 6068, 6500, 7400, 7585, 8200, 9250, 9620, 10250, 10660, 12025, 12136, 13000, 13325, 15170, 18500, 19240, 19721, 20500, 21320, 24050, 26650, 30340, 37000, 37925, 39442, 41000, 48100, 53300, 60125, 60680, 66625, 75850, 78884, 96200, 98605, 106600, 120250, 133250, 151700, 157768, 189625, 197210, 240500, 266500, 303400, 379250, 394420, 481000, 493025, 533000, 758500, 788840, 986050, 1517000, 1972100, 2465125, 3944200, 4930250, 9860500, 19721000]

約数ペア:

[(1, 19721000), (2, 9860500), (4, 4930250), (5, 3944200), (8, 2465125), (10, 1972100), (13, 1517000), (20, 986050), (25, 788840), (26, 758500), (37, 533000), (40, 493025), (41, 481000), (50, 394420), (52, 379250), (65, 303400), (74, 266500), (82, 240500), (100, 197210), (104, 189625), (125, 157768), (130, 151700), (148, 133250), (164, 120250), (185, 106600), (200, 98605), (205, 96200), (250, 78884), (260, 75850), (296, 66625), (325, 60680), (328, 60125), (370, 53300), (410, 48100), (481, 41000), (500, 39442), (520, 37925), (533, 37000), (650, 30340), (740, 26650), (820, 24050), (925, 21320), (962, 20500), (1000, 19721), (1025, 19240), (1066, 18500), (1300, 15170), (1480, 13325), (1517, 13000), (1625, 12136), (1640, 12025), (1850, 10660), (1924, 10250), (2050, 9620), (2132, 9250), (2405, 8200), (2600, 7585), (2665, 7400), (3034, 6500), (3250, 6068), (3700, 5330), (3848, 5125), (4100, 4810), (4264, 4625)]