20664020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:177

約数の個数: 96

約数和(自身を含む): 50803200

約数和(自身を除く): 30139180

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 47, 52, 65, 76, 89, 94, 95, 130, 178, 188, 190, 235, 247, 260, 356, 380, 445, 470, 494, 611, 890, 893, 940, 988, 1157, 1222, 1235, 1691, 1780, 1786, 2314, 2444, 2470, 3055, 3382, 3572, 4183, 4465, 4628, 4940, 5785, 6110, 6764, 8366, 8455, 8930, 11570, 11609, 12220, 16732, 16910, 17860, 20915, 21983, 23140, 23218, 33820, 41830, 43966, 46436, 54379, 58045, 79477, 83660, 87932, 108758, 109915, 116090, 158954, 217516, 219830, 232180, 271895, 317908, 397385, 439660, 543790, 794770, 1033201, 1087580, 1589540, 2066402, 4132804, 5166005, 10332010, 20664020]

約数ペア:

[(1, 20664020), (2, 10332010), (4, 5166005), (5, 4132804), (10, 2066402), (13, 1589540), (19, 1087580), (20, 1033201), (26, 794770), (38, 543790), (47, 439660), (52, 397385), (65, 317908), (76, 271895), (89, 232180), (94, 219830), (95, 217516), (130, 158954), (178, 116090), (188, 109915), (190, 108758), (235, 87932), (247, 83660), (260, 79477), (356, 58045), (380, 54379), (445, 46436), (470, 43966), (494, 41830), (611, 33820), (890, 23218), (893, 23140), (940, 21983), (988, 20915), (1157, 17860), (1222, 16910), (1235, 16732), (1691, 12220), (1780, 11609), (1786, 11570), (2314, 8930), (2444, 8455), (2470, 8366), (3055, 6764), (3382, 6110), (3572, 5785), (4183, 4940), (4465, 4628)]