20667780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{349}}^1$

素因数の和:418

約数の個数: 144

約数和(自身を含む): 73382400

約数和(自身を除く): 52714620

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 47, 60, 63, 70, 84, 90, 94, 105, 126, 140, 141, 180, 188, 210, 235, 252, 282, 315, 329, 349, 420, 423, 470, 564, 630, 658, 698, 705, 846, 940, 987, 1047, 1260, 1316, 1396, 1410, 1645, 1692, 1745, 1974, 2094, 2115, 2443, 2820, 2961, 3141, 3290, 3490, 3948, 4188, 4230, 4886, 4935, 5235, 5922, 6282, 6580, 6980, 7329, 8460, 9772, 9870, 10470, 11844, 12215, 12564, 14658, 14805, 15705, 16403, 19740, 20940, 21987, 24430, 29316, 29610, 31410, 32806, 36645, 43974, 48860, 49209, 59220, 62820, 65612, 73290, 82015, 87948, 98418, 109935, 114821, 146580, 147627, 164030, 196836, 219870, 229642, 246045, 295254, 328060, 344463, 439740, 459284, 492090, 574105, 590508, 688926, 738135, 984180, 1033389, 1148210, 1377852, 1476270, 1722315, 2066778, 2296420, 2952540, 3444630, 4133556, 5166945, 6889260, 10333890, 20667780]

約数ペア:

[(1, 20667780), (2, 10333890), (3, 6889260), (4, 5166945), (5, 4133556), (6, 3444630), (7, 2952540), (9, 2296420), (10, 2066778), (12, 1722315), (14, 1476270), (15, 1377852), (18, 1148210), (20, 1033389), (21, 984180), (28, 738135), (30, 688926), (35, 590508), (36, 574105), (42, 492090), (45, 459284), (47, 439740), (60, 344463), (63, 328060), (70, 295254), (84, 246045), (90, 229642), (94, 219870), (105, 196836), (126, 164030), (140, 147627), (141, 146580), (180, 114821), (188, 109935), (210, 98418), (235, 87948), (252, 82015), (282, 73290), (315, 65612), (329, 62820), (349, 59220), (420, 49209), (423, 48860), (470, 43974), (564, 36645), (630, 32806), (658, 31410), (698, 29610), (705, 29316), (846, 24430), (940, 21987), (987, 20940), (1047, 19740), (1260, 16403), (1316, 15705), (1396, 14805), (1410, 14658), (1645, 12564), (1692, 12215), (1745, 11844), (1974, 10470), (2094, 9870), (2115, 9772), (2443, 8460), (2820, 7329), (2961, 6980), (3141, 6580), (3290, 6282), (3490, 5922), (3948, 5235), (4188, 4935), (4230, 4886)]