20165860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{641}}^1$

素因数の和:685

約数の個数: 72

約数和(自身を含む): 50206968

約数和(自身を除く): 30041108

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 121, 130, 143, 220, 242, 260, 286, 484, 572, 605, 641, 715, 1210, 1282, 1430, 1573, 2420, 2564, 2860, 3146, 3205, 6292, 6410, 7051, 7865, 8333, 12820, 14102, 15730, 16666, 28204, 31460, 33332, 35255, 41665, 70510, 77561, 83330, 91663, 141020, 155122, 166660, 183326, 310244, 366652, 387805, 458315, 775610, 916630, 1008293, 1551220, 1833260, 2016586, 4033172, 5041465, 10082930, 20165860]

約数ペア:

[(1, 20165860), (2, 10082930), (4, 5041465), (5, 4033172), (10, 2016586), (11, 1833260), (13, 1551220), (20, 1008293), (22, 916630), (26, 775610), (44, 458315), (52, 387805), (55, 366652), (65, 310244), (110, 183326), (121, 166660), (130, 155122), (143, 141020), (220, 91663), (242, 83330), (260, 77561), (286, 70510), (484, 41665), (572, 35255), (605, 33332), (641, 31460), (715, 28204), (1210, 16666), (1282, 15730), (1430, 14102), (1573, 12820), (2420, 8333), (2564, 7865), (2860, 7051), (3146, 6410), (3205, 6292)]