20997540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:170

約数の個数: 144

約数和(自身を含む): 67931136

約数和(自身を除く): 46933596

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 31, 36, 45, 53, 60, 62, 71, 90, 93, 106, 124, 142, 155, 159, 180, 186, 212, 213, 265, 279, 284, 310, 318, 355, 372, 426, 465, 477, 530, 558, 620, 636, 639, 710, 795, 852, 930, 954, 1060, 1065, 1116, 1278, 1395, 1420, 1590, 1643, 1860, 1908, 2130, 2201, 2385, 2556, 2790, 3180, 3195, 3286, 3763, 4260, 4402, 4770, 4929, 5580, 6390, 6572, 6603, 7526, 8215, 8804, 9540, 9858, 11005, 11289, 12780, 13206, 14787, 15052, 16430, 18815, 19716, 19809, 22010, 22578, 24645, 26412, 29574, 32860, 33015, 33867, 37630, 39618, 44020, 45156, 49290, 56445, 59148, 66030, 67734, 73935, 75260, 79236, 98580, 99045, 112890, 116653, 132060, 135468, 147870, 169335, 198090, 225780, 233306, 295740, 338670, 349959, 396180, 466612, 583265, 677340, 699918, 1049877, 1166530, 1399836, 1749795, 2099754, 2333060, 3499590, 4199508, 5249385, 6999180, 10498770, 20997540]

約数ペア:

[(1, 20997540), (2, 10498770), (3, 6999180), (4, 5249385), (5, 4199508), (6, 3499590), (9, 2333060), (10, 2099754), (12, 1749795), (15, 1399836), (18, 1166530), (20, 1049877), (30, 699918), (31, 677340), (36, 583265), (45, 466612), (53, 396180), (60, 349959), (62, 338670), (71, 295740), (90, 233306), (93, 225780), (106, 198090), (124, 169335), (142, 147870), (155, 135468), (159, 132060), (180, 116653), (186, 112890), (212, 99045), (213, 98580), (265, 79236), (279, 75260), (284, 73935), (310, 67734), (318, 66030), (355, 59148), (372, 56445), (426, 49290), (465, 45156), (477, 44020), (530, 39618), (558, 37630), (620, 33867), (636, 33015), (639, 32860), (710, 29574), (795, 26412), (852, 24645), (930, 22578), (954, 22010), (1060, 19809), (1065, 19716), (1116, 18815), (1278, 16430), (1395, 15052), (1420, 14787), (1590, 13206), (1643, 12780), (1860, 11289), (1908, 11005), (2130, 9858), (2201, 9540), (2385, 8804), (2556, 8215), (2790, 7526), (3180, 6603), (3195, 6572), (3286, 6390), (3763, 5580), (4260, 4929), (4402, 4770)]