18536680

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:250

約数の個数: 64

約数和(自身を含む): 43390080

約数和(自身を除く): 24853400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 71, 107, 122, 142, 214, 244, 284, 305, 355, 428, 488, 535, 568, 610, 710, 856, 1070, 1220, 1420, 2140, 2440, 2840, 4280, 4331, 6527, 7597, 8662, 13054, 15194, 17324, 21655, 26108, 30388, 32635, 34648, 37985, 43310, 52216, 60776, 65270, 75970, 86620, 130540, 151940, 173240, 261080, 303880, 463417, 926834, 1853668, 2317085, 3707336, 4634170, 9268340, 18536680]

約数ペア:

[(1, 18536680), (2, 9268340), (4, 4634170), (5, 3707336), (8, 2317085), (10, 1853668), (20, 926834), (40, 463417), (61, 303880), (71, 261080), (107, 173240), (122, 151940), (142, 130540), (214, 86620), (244, 75970), (284, 65270), (305, 60776), (355, 52216), (428, 43310), (488, 37985), (535, 34648), (568, 32635), (610, 30388), (710, 26108), (856, 21655), (1070, 17324), (1220, 15194), (1420, 13054), (2140, 8662), (2440, 7597), (2840, 6527), (4280, 4331)]