20509020

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{397}}^1$

素因数の和:460

約数の個数: 144

約数和(自身を含む): 73015488

約数和(自身を除く): 52506468

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 41, 42, 45, 60, 63, 70, 82, 84, 90, 105, 123, 126, 140, 164, 180, 205, 210, 246, 252, 287, 315, 369, 397, 410, 420, 492, 574, 615, 630, 738, 794, 820, 861, 1148, 1191, 1230, 1260, 1435, 1476, 1588, 1722, 1845, 1985, 2382, 2460, 2583, 2779, 2870, 3444, 3573, 3690, 3970, 4305, 4764, 5166, 5558, 5740, 5955, 7146, 7380, 7940, 8337, 8610, 10332, 11116, 11910, 12915, 13895, 14292, 16277, 16674, 17220, 17865, 23820, 25011, 25830, 27790, 32554, 33348, 35730, 41685, 48831, 50022, 51660, 55580, 65108, 71460, 81385, 83370, 97662, 100044, 113939, 125055, 146493, 162770, 166740, 195324, 227878, 244155, 250110, 292986, 325540, 341817, 455756, 488310, 500220, 569695, 585972, 683634, 732465, 976620, 1025451, 1139390, 1367268, 1464930, 1709085, 2050902, 2278780, 2929860, 3418170, 4101804, 5127255, 6836340, 10254510, 20509020]

約数ペア:

[(1, 20509020), (2, 10254510), (3, 6836340), (4, 5127255), (5, 4101804), (6, 3418170), (7, 2929860), (9, 2278780), (10, 2050902), (12, 1709085), (14, 1464930), (15, 1367268), (18, 1139390), (20, 1025451), (21, 976620), (28, 732465), (30, 683634), (35, 585972), (36, 569695), (41, 500220), (42, 488310), (45, 455756), (60, 341817), (63, 325540), (70, 292986), (82, 250110), (84, 244155), (90, 227878), (105, 195324), (123, 166740), (126, 162770), (140, 146493), (164, 125055), (180, 113939), (205, 100044), (210, 97662), (246, 83370), (252, 81385), (287, 71460), (315, 65108), (369, 55580), (397, 51660), (410, 50022), (420, 48831), (492, 41685), (574, 35730), (615, 33348), (630, 32554), (738, 27790), (794, 25830), (820, 25011), (861, 23820), (1148, 17865), (1191, 17220), (1230, 16674), (1260, 16277), (1435, 14292), (1476, 13895), (1588, 12915), (1722, 11910), (1845, 11116), (1985, 10332), (2382, 8610), (2460, 8337), (2583, 7940), (2779, 7380), (2870, 7146), (3444, 5955), (3573, 5740), (3690, 5558), (3970, 5166), (4305, 4764)]