20821140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{883}}^1$

素因数の和:1029

約数の個数: 72

約数和(自身を含む): 63711648

約数和(自身を除く): 42890508

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 131, 180, 262, 393, 524, 655, 786, 883, 1179, 1310, 1572, 1766, 1965, 2358, 2620, 2649, 3532, 3930, 4415, 4716, 5298, 5895, 7860, 7947, 8830, 10596, 11790, 13245, 15894, 17660, 23580, 26490, 31788, 39735, 52980, 79470, 115673, 158940, 231346, 347019, 462692, 578365, 694038, 1041057, 1156730, 1388076, 1735095, 2082114, 2313460, 3470190, 4164228, 5205285, 6940380, 10410570, 20821140]

約数ペア:

[(1, 20821140), (2, 10410570), (3, 6940380), (4, 5205285), (5, 4164228), (6, 3470190), (9, 2313460), (10, 2082114), (12, 1735095), (15, 1388076), (18, 1156730), (20, 1041057), (30, 694038), (36, 578365), (45, 462692), (60, 347019), (90, 231346), (131, 158940), (180, 115673), (262, 79470), (393, 52980), (524, 39735), (655, 31788), (786, 26490), (883, 23580), (1179, 17660), (1310, 15894), (1572, 13245), (1766, 11790), (1965, 10596), (2358, 8830), (2620, 7947), (2649, 7860), (3532, 5895), (3930, 5298), (4415, 4716)]