28878640

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:219

約数の個数: 120

約数和(自身を含む): 80151120

約数和(自身を除く): 51272480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 53, 56, 70, 80, 98, 106, 112, 139, 140, 196, 212, 245, 265, 278, 280, 371, 392, 424, 490, 530, 556, 560, 695, 742, 784, 848, 973, 980, 1060, 1112, 1390, 1484, 1855, 1946, 1960, 2120, 2224, 2597, 2780, 2968, 3710, 3892, 3920, 4240, 4865, 5194, 5560, 5936, 6811, 7367, 7420, 7784, 9730, 10388, 11120, 12985, 13622, 14734, 14840, 15568, 19460, 20776, 25970, 27244, 29468, 29680, 34055, 36835, 38920, 41552, 51569, 51940, 54488, 58936, 68110, 73670, 77840, 103138, 103880, 108976, 117872, 136220, 147340, 206276, 207760, 257845, 272440, 294680, 360983, 412552, 515690, 544880, 589360, 721966, 825104, 1031380, 1443932, 1804915, 2062760, 2887864, 3609830, 4125520, 5775728, 7219660, 14439320, 28878640]

約数ペア:

[(1, 28878640), (2, 14439320), (4, 7219660), (5, 5775728), (7, 4125520), (8, 3609830), (10, 2887864), (14, 2062760), (16, 1804915), (20, 1443932), (28, 1031380), (35, 825104), (40, 721966), (49, 589360), (53, 544880), (56, 515690), (70, 412552), (80, 360983), (98, 294680), (106, 272440), (112, 257845), (139, 207760), (140, 206276), (196, 147340), (212, 136220), (245, 117872), (265, 108976), (278, 103880), (280, 103138), (371, 77840), (392, 73670), (424, 68110), (490, 58936), (530, 54488), (556, 51940), (560, 51569), (695, 41552), (742, 38920), (784, 36835), (848, 34055), (973, 29680), (980, 29468), (1060, 27244), (1112, 25970), (1390, 20776), (1484, 19460), (1855, 15568), (1946, 14840), (1960, 14734), (2120, 13622), (2224, 12985), (2597, 11120), (2780, 10388), (2968, 9730), (3710, 7784), (3892, 7420), (3920, 7367), (4240, 6811), (4865, 5936), (5194, 5560)]