20734840

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:245

約数の個数: 96

約数和(自身を含む): 55404000

約数和(自身を除く): 34669160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 71, 98, 140, 142, 149, 196, 245, 280, 284, 298, 355, 392, 490, 497, 568, 596, 710, 745, 980, 994, 1043, 1192, 1420, 1490, 1960, 1988, 2086, 2485, 2840, 2980, 3479, 3976, 4172, 4970, 5215, 5960, 6958, 7301, 8344, 9940, 10430, 10579, 13916, 14602, 17395, 19880, 20860, 21158, 27832, 29204, 34790, 36505, 41720, 42316, 52895, 58408, 69580, 73010, 74053, 84632, 105790, 139160, 146020, 148106, 211580, 292040, 296212, 370265, 423160, 518371, 592424, 740530, 1036742, 1481060, 2073484, 2591855, 2962120, 4146968, 5183710, 10367420, 20734840]

約数ペア:

[(1, 20734840), (2, 10367420), (4, 5183710), (5, 4146968), (7, 2962120), (8, 2591855), (10, 2073484), (14, 1481060), (20, 1036742), (28, 740530), (35, 592424), (40, 518371), (49, 423160), (56, 370265), (70, 296212), (71, 292040), (98, 211580), (140, 148106), (142, 146020), (149, 139160), (196, 105790), (245, 84632), (280, 74053), (284, 73010), (298, 69580), (355, 58408), (392, 52895), (490, 42316), (497, 41720), (568, 36505), (596, 34790), (710, 29204), (745, 27832), (980, 21158), (994, 20860), (1043, 19880), (1192, 17395), (1420, 14602), (1490, 13916), (1960, 10579), (1988, 10430), (2086, 9940), (2485, 8344), (2840, 7301), (2980, 6958), (3479, 5960), (3976, 5215), (4172, 4970)]