20481960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{181}}^1$

素因数の和:259

約数の個数: 128

約数和(自身を含む): 66044160

約数和(自身を除く): 45562200

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 40, 41, 46, 60, 69, 82, 92, 115, 120, 123, 138, 164, 181, 184, 205, 230, 246, 276, 328, 345, 362, 410, 460, 492, 543, 552, 615, 690, 724, 820, 905, 920, 943, 984, 1086, 1230, 1380, 1448, 1640, 1810, 1886, 2172, 2460, 2715, 2760, 2829, 3620, 3772, 4163, 4344, 4715, 4920, 5430, 5658, 7240, 7421, 7544, 8326, 9430, 10860, 11316, 12489, 14145, 14842, 16652, 18860, 20815, 21720, 22263, 22632, 24978, 28290, 29684, 33304, 37105, 37720, 41630, 44526, 49956, 56580, 59368, 62445, 74210, 83260, 89052, 99912, 111315, 113160, 124890, 148420, 166520, 170683, 178104, 222630, 249780, 296840, 341366, 445260, 499560, 512049, 682732, 853415, 890520, 1024098, 1365464, 1706830, 2048196, 2560245, 3413660, 4096392, 5120490, 6827320, 10240980, 20481960]

約数ペア:

[(1, 20481960), (2, 10240980), (3, 6827320), (4, 5120490), (5, 4096392), (6, 3413660), (8, 2560245), (10, 2048196), (12, 1706830), (15, 1365464), (20, 1024098), (23, 890520), (24, 853415), (30, 682732), (40, 512049), (41, 499560), (46, 445260), (60, 341366), (69, 296840), (82, 249780), (92, 222630), (115, 178104), (120, 170683), (123, 166520), (138, 148420), (164, 124890), (181, 113160), (184, 111315), (205, 99912), (230, 89052), (246, 83260), (276, 74210), (328, 62445), (345, 59368), (362, 56580), (410, 49956), (460, 44526), (492, 41630), (543, 37720), (552, 37105), (615, 33304), (690, 29684), (724, 28290), (820, 24978), (905, 22632), (920, 22263), (943, 21720), (984, 20815), (1086, 18860), (1230, 16652), (1380, 14842), (1448, 14145), (1640, 12489), (1810, 11316), (1886, 10860), (2172, 9430), (2460, 8326), (2715, 7544), (2760, 7421), (2829, 7240), (3620, 5658), (3772, 5430), (4163, 4920), (4344, 4715)]