28757840

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:228

約数の個数: 80

約数和(自身を含む): 69745536

約数和(自身を除く): 40987696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 71, 80, 83, 122, 142, 166, 244, 284, 305, 332, 355, 415, 488, 568, 610, 664, 710, 830, 976, 1136, 1220, 1328, 1420, 1660, 2440, 2840, 3320, 4331, 4880, 5063, 5680, 5893, 6640, 8662, 10126, 11786, 17324, 20252, 21655, 23572, 25315, 29465, 34648, 40504, 43310, 47144, 50630, 58930, 69296, 81008, 86620, 94288, 101260, 117860, 173240, 202520, 235720, 346480, 359473, 405040, 471440, 718946, 1437892, 1797365, 2875784, 3594730, 5751568, 7189460, 14378920, 28757840]

約数ペア:

[(1, 28757840), (2, 14378920), (4, 7189460), (5, 5751568), (8, 3594730), (10, 2875784), (16, 1797365), (20, 1437892), (40, 718946), (61, 471440), (71, 405040), (80, 359473), (83, 346480), (122, 235720), (142, 202520), (166, 173240), (244, 117860), (284, 101260), (305, 94288), (332, 86620), (355, 81008), (415, 69296), (488, 58930), (568, 50630), (610, 47144), (664, 43310), (710, 40504), (830, 34648), (976, 29465), (1136, 25315), (1220, 23572), (1328, 21655), (1420, 20252), (1660, 17324), (2440, 11786), (2840, 10126), (3320, 8662), (4331, 6640), (4880, 5893), (5063, 5680)]