20520540

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:313

約数の個数: 120

約数和(自身を含む): 65862720

約数和(自身を除く): 45342180

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 53, 54, 60, 81, 90, 106, 108, 135, 159, 162, 180, 212, 239, 265, 270, 318, 324, 405, 477, 478, 530, 540, 636, 717, 795, 810, 954, 956, 1060, 1195, 1431, 1434, 1590, 1620, 1908, 2151, 2385, 2390, 2862, 2868, 3180, 3585, 4293, 4302, 4770, 4780, 5724, 6453, 7155, 7170, 8586, 8604, 9540, 10755, 12667, 12906, 14310, 14340, 17172, 19359, 21465, 21510, 25334, 25812, 28620, 32265, 38001, 38718, 42930, 43020, 50668, 63335, 64530, 76002, 77436, 85860, 96795, 114003, 126670, 129060, 152004, 190005, 193590, 228006, 253340, 342009, 380010, 387180, 456012, 570015, 684018, 760020, 1026027, 1140030, 1368036, 1710045, 2052054, 2280060, 3420090, 4104108, 5130135, 6840180, 10260270, 20520540]

約数ペア:

[(1, 20520540), (2, 10260270), (3, 6840180), (4, 5130135), (5, 4104108), (6, 3420090), (9, 2280060), (10, 2052054), (12, 1710045), (15, 1368036), (18, 1140030), (20, 1026027), (27, 760020), (30, 684018), (36, 570015), (45, 456012), (53, 387180), (54, 380010), (60, 342009), (81, 253340), (90, 228006), (106, 193590), (108, 190005), (135, 152004), (159, 129060), (162, 126670), (180, 114003), (212, 96795), (239, 85860), (265, 77436), (270, 76002), (318, 64530), (324, 63335), (405, 50668), (477, 43020), (478, 42930), (530, 38718), (540, 38001), (636, 32265), (717, 28620), (795, 25812), (810, 25334), (954, 21510), (956, 21465), (1060, 19359), (1195, 17172), (1431, 14340), (1434, 14310), (1590, 12906), (1620, 12667), (1908, 10755), (2151, 9540), (2385, 8604), (2390, 8586), (2862, 7170), (2868, 7155), (3180, 6453), (3585, 5724), (4293, 4780), (4302, 4770)]