27198680

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:300

約数の個数: 64

約数和(自身を含む): 63478080

約数和(自身を除く): 36279400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 71, 122, 142, 157, 244, 284, 305, 314, 355, 488, 568, 610, 628, 710, 785, 1220, 1256, 1420, 1570, 2440, 2840, 3140, 4331, 6280, 8662, 9577, 11147, 17324, 19154, 21655, 22294, 34648, 38308, 43310, 44588, 47885, 55735, 76616, 86620, 89176, 95770, 111470, 173240, 191540, 222940, 383080, 445880, 679967, 1359934, 2719868, 3399835, 5439736, 6799670, 13599340, 27198680]

約数ペア:

[(1, 27198680), (2, 13599340), (4, 6799670), (5, 5439736), (8, 3399835), (10, 2719868), (20, 1359934), (40, 679967), (61, 445880), (71, 383080), (122, 222940), (142, 191540), (157, 173240), (244, 111470), (284, 95770), (305, 89176), (314, 86620), (355, 76616), (488, 55735), (568, 47885), (610, 44588), (628, 43310), (710, 38308), (785, 34648), (1220, 22294), (1256, 21655), (1420, 19154), (1570, 17324), (2440, 11147), (2840, 9577), (3140, 8662), (4331, 6280)]