20801580

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:359

約数の個数: 96

約数和(自身を含む): 62415360

約数和(自身を除く): 41613780

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 38, 57, 60, 71, 76, 95, 114, 142, 190, 213, 228, 257, 284, 285, 355, 380, 426, 514, 570, 710, 771, 852, 1028, 1065, 1140, 1285, 1349, 1420, 1542, 2130, 2570, 2698, 3084, 3855, 4047, 4260, 4883, 5140, 5396, 6745, 7710, 8094, 9766, 13490, 14649, 15420, 16188, 18247, 19532, 20235, 24415, 26980, 29298, 36494, 40470, 48830, 54741, 58596, 72988, 73245, 80940, 91235, 97660, 109482, 146490, 182470, 218964, 273705, 292980, 346693, 364940, 547410, 693386, 1040079, 1094820, 1386772, 1733465, 2080158, 3466930, 4160316, 5200395, 6933860, 10400790, 20801580]

約数ペア:

[(1, 20801580), (2, 10400790), (3, 6933860), (4, 5200395), (5, 4160316), (6, 3466930), (10, 2080158), (12, 1733465), (15, 1386772), (19, 1094820), (20, 1040079), (30, 693386), (38, 547410), (57, 364940), (60, 346693), (71, 292980), (76, 273705), (95, 218964), (114, 182470), (142, 146490), (190, 109482), (213, 97660), (228, 91235), (257, 80940), (284, 73245), (285, 72988), (355, 58596), (380, 54741), (426, 48830), (514, 40470), (570, 36494), (710, 29298), (771, 26980), (852, 24415), (1028, 20235), (1065, 19532), (1140, 18247), (1285, 16188), (1349, 15420), (1420, 14649), (1542, 13490), (2130, 9766), (2570, 8094), (2698, 7710), (3084, 6745), (3855, 5396), (4047, 5140), (4260, 4883)]