20951004880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{112543}}^1$

素因数の和:112748

約数の個数: 80

約数和(自身を含む): 52751623680

約数和(自身を除く): 31800618800

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 179, 208, 260, 358, 520, 716, 895, 1040, 1432, 1790, 2327, 2864, 3580, 4654, 7160, 9308, 11635, 14320, 18616, 23270, 37232, 46540, 93080, 112543, 186160, 225086, 450172, 562715, 900344, 1125430, 1463059, 1800688, 2250860, 2926118, 4501720, 5852236, 7315295, 9003440, 11704472, 14630590, 20145197, 23408944, 29261180, 40290394, 58522360, 80580788, 100725985, 117044720, 161161576, 201451970, 261887561, 322323152, 402903940, 523775122, 805807880, 1047550244, 1309437805, 1611615760, 2095100488, 2618875610, 4190200976, 5237751220, 10475502440, 20951004880]

約数ペア:

[(1, 20951004880), (2, 10475502440), (4, 5237751220), (5, 4190200976), (8, 2618875610), (10, 2095100488), (13, 1611615760), (16, 1309437805), (20, 1047550244), (26, 805807880), (40, 523775122), (52, 402903940), (65, 322323152), (80, 261887561), (104, 201451970), (130, 161161576), (179, 117044720), (208, 100725985), (260, 80580788), (358, 58522360), (520, 40290394), (716, 29261180), (895, 23408944), (1040, 20145197), (1432, 14630590), (1790, 11704472), (2327, 9003440), (2864, 7315295), (3580, 5852236), (4654, 4501720), (7160, 2926118), (9308, 2250860), (11635, 1800688), (14320, 1463059), (18616, 1125430), (23270, 900344), (37232, 562715), (46540, 450172), (93080, 225086), (112543, 186160)]