18207920

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:202

約数の個数: 80

約数和(自身を含む): 44520960

約数和(自身を除く): 26313040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 67, 79, 80, 86, 134, 158, 172, 215, 268, 316, 335, 344, 395, 430, 536, 632, 670, 688, 790, 860, 1072, 1264, 1340, 1580, 1720, 2680, 2881, 3160, 3397, 3440, 5293, 5360, 5762, 6320, 6794, 10586, 11524, 13588, 14405, 16985, 21172, 23048, 26465, 27176, 28810, 33970, 42344, 46096, 52930, 54352, 57620, 67940, 84688, 105860, 115240, 135880, 211720, 227599, 230480, 271760, 423440, 455198, 910396, 1137995, 1820792, 2275990, 3641584, 4551980, 9103960, 18207920]

約数ペア:

[(1, 18207920), (2, 9103960), (4, 4551980), (5, 3641584), (8, 2275990), (10, 1820792), (16, 1137995), (20, 910396), (40, 455198), (43, 423440), (67, 271760), (79, 230480), (80, 227599), (86, 211720), (134, 135880), (158, 115240), (172, 105860), (215, 84688), (268, 67940), (316, 57620), (335, 54352), (344, 52930), (395, 46096), (430, 42344), (536, 33970), (632, 28810), (670, 27176), (688, 26465), (790, 23048), (860, 21172), (1072, 16985), (1264, 14405), (1340, 13588), (1580, 11524), (1720, 10586), (2680, 6794), (2881, 6320), (3160, 5762), (3397, 5360), (3440, 5293)]