81884920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{157}}^1$

素因数の和:257

約数の個数: 128

約数和(自身を含む): 215006400

約数和(自身を除く): 133121480

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 59, 65, 68, 85, 104, 118, 130, 136, 157, 170, 221, 236, 260, 295, 314, 340, 442, 472, 520, 590, 628, 680, 767, 785, 884, 1003, 1105, 1180, 1256, 1534, 1570, 1768, 2006, 2041, 2210, 2360, 2669, 3068, 3140, 3835, 4012, 4082, 4420, 5015, 5338, 6136, 6280, 7670, 8024, 8164, 8840, 9263, 10030, 10205, 10676, 13039, 13345, 15340, 16328, 18526, 20060, 20410, 21352, 26078, 26690, 30680, 34697, 37052, 40120, 40820, 46315, 52156, 53380, 65195, 69394, 74104, 81640, 92630, 104312, 106760, 120419, 130390, 138788, 157471, 173485, 185260, 240838, 260780, 277576, 314942, 346970, 370520, 481676, 521560, 602095, 629884, 693940, 787355, 963352, 1204190, 1259768, 1387880, 1574710, 2047123, 2408380, 3149420, 4094246, 4816760, 6298840, 8188492, 10235615, 16376984, 20471230, 40942460, 81884920]

約数ペア:

[(1, 81884920), (2, 40942460), (4, 20471230), (5, 16376984), (8, 10235615), (10, 8188492), (13, 6298840), (17, 4816760), (20, 4094246), (26, 3149420), (34, 2408380), (40, 2047123), (52, 1574710), (59, 1387880), (65, 1259768), (68, 1204190), (85, 963352), (104, 787355), (118, 693940), (130, 629884), (136, 602095), (157, 521560), (170, 481676), (221, 370520), (236, 346970), (260, 314942), (295, 277576), (314, 260780), (340, 240838), (442, 185260), (472, 173485), (520, 157471), (590, 138788), (628, 130390), (680, 120419), (767, 106760), (785, 104312), (884, 92630), (1003, 81640), (1105, 74104), (1180, 69394), (1256, 65195), (1534, 53380), (1570, 52156), (1768, 46315), (2006, 40820), (2041, 40120), (2210, 37052), (2360, 34697), (2669, 30680), (3068, 26690), (3140, 26078), (3835, 21352), (4012, 20410), (4082, 20060), (4420, 18526), (5015, 16328), (5338, 15340), (6136, 13345), (6280, 13039), (7670, 10676), (8024, 10205), (8164, 10030), (8840, 9263)]