121321720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{131}}^1\times {\mathrm{137}}^1$

素因数の和:305

約数の個数: 96

約数和(自身を含む): 300017520

約数和(自身を除く): 178695800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 131, 137, 169, 260, 262, 274, 338, 520, 524, 548, 655, 676, 685, 845, 1048, 1096, 1310, 1352, 1370, 1690, 1703, 1781, 2620, 2740, 3380, 3406, 3562, 5240, 5480, 6760, 6812, 7124, 8515, 8905, 13624, 14248, 17030, 17810, 17947, 22139, 23153, 34060, 35620, 35894, 44278, 46306, 68120, 71240, 71788, 88556, 89735, 92612, 110695, 115765, 143576, 177112, 179470, 185224, 221390, 231530, 233311, 358940, 442780, 463060, 466622, 717880, 885560, 926120, 933244, 1166555, 1866488, 2333110, 3033043, 4666220, 6066086, 9332440, 12132172, 15165215, 24264344, 30330430, 60660860, 121321720]

約数ペア:

[(1, 121321720), (2, 60660860), (4, 30330430), (5, 24264344), (8, 15165215), (10, 12132172), (13, 9332440), (20, 6066086), (26, 4666220), (40, 3033043), (52, 2333110), (65, 1866488), (104, 1166555), (130, 933244), (131, 926120), (137, 885560), (169, 717880), (260, 466622), (262, 463060), (274, 442780), (338, 358940), (520, 233311), (524, 231530), (548, 221390), (655, 185224), (676, 179470), (685, 177112), (845, 143576), (1048, 115765), (1096, 110695), (1310, 92612), (1352, 89735), (1370, 88556), (1690, 71788), (1703, 71240), (1781, 68120), (2620, 46306), (2740, 44278), (3380, 35894), (3406, 35620), (3562, 34060), (5240, 23153), (5480, 22139), (6760, 17947), (6812, 17810), (7124, 17030), (8515, 14248), (8905, 13624)]