1664720720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{84247}}^1$

素因数の和:84292

約数の個数: 80

約数和(自身を含む): 4387635840

約数和(自身を除く): 2722915120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 190, 208, 247, 260, 304, 380, 494, 520, 760, 988, 1040, 1235, 1520, 1976, 2470, 3952, 4940, 9880, 19760, 84247, 168494, 336988, 421235, 673976, 842470, 1095211, 1347952, 1600693, 1684940, 2190422, 3201386, 3369880, 4380844, 5476055, 6402772, 6739760, 8003465, 8761688, 10952110, 12805544, 16006930, 17523376, 20809009, 21904220, 25611088, 32013860, 41618018, 43808440, 64027720, 83236036, 87616880, 104045045, 128055440, 166472072, 208090090, 332944144, 416180180, 832360360, 1664720720]

約数ペア:

[(1, 1664720720), (2, 832360360), (4, 416180180), (5, 332944144), (8, 208090090), (10, 166472072), (13, 128055440), (16, 104045045), (19, 87616880), (20, 83236036), (26, 64027720), (38, 43808440), (40, 41618018), (52, 32013860), (65, 25611088), (76, 21904220), (80, 20809009), (95, 17523376), (104, 16006930), (130, 12805544), (152, 10952110), (190, 8761688), (208, 8003465), (247, 6739760), (260, 6402772), (304, 5476055), (380, 4380844), (494, 3369880), (520, 3201386), (760, 2190422), (988, 1684940), (1040, 1600693), (1235, 1347952), (1520, 1095211), (1976, 842470), (2470, 673976), (3952, 421235), (4940, 336988), (9880, 168494), (19760, 84247)]