208917680

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{1381}}^1$

素因数の和:1486

約数の個数: 80

約数和(自身を含む): 509991168

約数和(自身を除く): 301073488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 61, 62, 80, 122, 124, 155, 244, 248, 305, 310, 488, 496, 610, 620, 976, 1220, 1240, 1381, 1891, 2440, 2480, 2762, 3782, 4880, 5524, 6905, 7564, 9455, 11048, 13810, 15128, 18910, 22096, 27620, 30256, 37820, 42811, 55240, 75640, 84241, 85622, 110480, 151280, 168482, 171244, 214055, 336964, 342488, 421205, 428110, 673928, 684976, 842410, 856220, 1347856, 1684820, 1712440, 2611471, 3369640, 3424880, 5222942, 6739280, 10445884, 13057355, 20891768, 26114710, 41783536, 52229420, 104458840, 208917680]

約数ペア:

[(1, 208917680), (2, 104458840), (4, 52229420), (5, 41783536), (8, 26114710), (10, 20891768), (16, 13057355), (20, 10445884), (31, 6739280), (40, 5222942), (61, 3424880), (62, 3369640), (80, 2611471), (122, 1712440), (124, 1684820), (155, 1347856), (244, 856220), (248, 842410), (305, 684976), (310, 673928), (488, 428110), (496, 421205), (610, 342488), (620, 336964), (976, 214055), (1220, 171244), (1240, 168482), (1381, 151280), (1891, 110480), (2440, 85622), (2480, 84241), (2762, 75640), (3782, 55240), (4880, 42811), (5524, 37820), (6905, 30256), (7564, 27620), (9455, 22096), (11048, 18910), (13810, 15128)]