20423480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{349}}^1$

素因数の和:397

約数の個数: 128

約数和(自身を含む): 60480000

約数和(自身を除く): 40056520

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 19, 20, 22, 28, 35, 38, 40, 44, 55, 56, 70, 76, 77, 88, 95, 110, 133, 140, 152, 154, 190, 209, 220, 266, 280, 308, 349, 380, 385, 418, 440, 532, 616, 665, 698, 760, 770, 836, 1045, 1064, 1330, 1396, 1463, 1540, 1672, 1745, 2090, 2443, 2660, 2792, 2926, 3080, 3490, 3839, 4180, 4886, 5320, 5852, 6631, 6980, 7315, 7678, 8360, 9772, 11704, 12215, 13262, 13960, 14630, 15356, 19195, 19544, 24430, 26524, 26873, 29260, 30712, 33155, 38390, 46417, 48860, 53048, 53746, 58520, 66310, 72941, 76780, 92834, 97720, 107492, 132620, 134365, 145882, 153560, 185668, 214984, 232085, 265240, 268730, 291764, 364705, 371336, 464170, 510587, 537460, 583528, 729410, 928340, 1021174, 1074920, 1458820, 1856680, 2042348, 2552935, 2917640, 4084696, 5105870, 10211740, 20423480]

約数ペア:

[(1, 20423480), (2, 10211740), (4, 5105870), (5, 4084696), (7, 2917640), (8, 2552935), (10, 2042348), (11, 1856680), (14, 1458820), (19, 1074920), (20, 1021174), (22, 928340), (28, 729410), (35, 583528), (38, 537460), (40, 510587), (44, 464170), (55, 371336), (56, 364705), (70, 291764), (76, 268730), (77, 265240), (88, 232085), (95, 214984), (110, 185668), (133, 153560), (140, 145882), (152, 134365), (154, 132620), (190, 107492), (209, 97720), (220, 92834), (266, 76780), (280, 72941), (308, 66310), (349, 58520), (380, 53746), (385, 53048), (418, 48860), (440, 46417), (532, 38390), (616, 33155), (665, 30712), (698, 29260), (760, 26873), (770, 26524), (836, 24430), (1045, 19544), (1064, 19195), (1330, 15356), (1396, 14630), (1463, 13960), (1540, 13262), (1672, 12215), (1745, 11704), (2090, 9772), (2443, 8360), (2660, 7678), (2792, 7315), (2926, 6980), (3080, 6631), (3490, 5852), (3839, 5320), (4180, 4886)]