81219320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{421}}^1$

素因数の和:505

約数の個数: 128

約数和(自身を含む): 229703040

約数和(自身を除く): 148483720

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 53, 56, 65, 70, 91, 104, 106, 130, 140, 182, 212, 260, 265, 280, 364, 371, 421, 424, 455, 520, 530, 689, 728, 742, 842, 910, 1060, 1378, 1484, 1684, 1820, 1855, 2105, 2120, 2756, 2947, 2968, 3368, 3445, 3640, 3710, 4210, 4823, 5473, 5512, 5894, 6890, 7420, 8420, 9646, 10946, 11788, 13780, 14735, 14840, 16840, 19292, 21892, 22313, 23576, 24115, 27365, 27560, 29470, 38311, 38584, 43784, 44626, 48230, 54730, 58940, 76622, 89252, 96460, 109460, 111565, 117880, 153244, 156191, 178504, 191555, 192920, 218920, 223130, 290069, 306488, 312382, 383110, 446260, 580138, 624764, 766220, 780955, 892520, 1160276, 1249528, 1450345, 1532440, 1561910, 2030483, 2320552, 2900690, 3123820, 4060966, 5801380, 6247640, 8121932, 10152415, 11602760, 16243864, 20304830, 40609660, 81219320]

約数ペア:

[(1, 81219320), (2, 40609660), (4, 20304830), (5, 16243864), (7, 11602760), (8, 10152415), (10, 8121932), (13, 6247640), (14, 5801380), (20, 4060966), (26, 3123820), (28, 2900690), (35, 2320552), (40, 2030483), (52, 1561910), (53, 1532440), (56, 1450345), (65, 1249528), (70, 1160276), (91, 892520), (104, 780955), (106, 766220), (130, 624764), (140, 580138), (182, 446260), (212, 383110), (260, 312382), (265, 306488), (280, 290069), (364, 223130), (371, 218920), (421, 192920), (424, 191555), (455, 178504), (520, 156191), (530, 153244), (689, 117880), (728, 111565), (742, 109460), (842, 96460), (910, 89252), (1060, 76622), (1378, 58940), (1484, 54730), (1684, 48230), (1820, 44626), (1855, 43784), (2105, 38584), (2120, 38311), (2756, 29470), (2947, 27560), (2968, 27365), (3368, 24115), (3445, 23576), (3640, 22313), (3710, 21892), (4210, 19292), (4823, 16840), (5473, 14840), (5512, 14735), (5894, 13780), (6890, 11788), (7420, 10946), (8420, 9646)]