28657980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{331}}^1$

素因数の和:396

約数の個数: 144

約数和(自身を含む): 96436704

約数和(自身を除く): 67778724

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 37, 39, 45, 52, 60, 65, 74, 78, 90, 111, 117, 130, 148, 156, 180, 185, 195, 222, 234, 260, 331, 333, 370, 390, 444, 468, 481, 555, 585, 662, 666, 740, 780, 962, 993, 1110, 1170, 1324, 1332, 1443, 1655, 1665, 1924, 1986, 2220, 2340, 2405, 2886, 2979, 3310, 3330, 3972, 4303, 4329, 4810, 4965, 5772, 5958, 6620, 6660, 7215, 8606, 8658, 9620, 9930, 11916, 12247, 12909, 14430, 14895, 17212, 17316, 19860, 21515, 21645, 24494, 25818, 28860, 29790, 36741, 38727, 43030, 43290, 48988, 51636, 59580, 61235, 64545, 73482, 77454, 86060, 86580, 110223, 122470, 129090, 146964, 154908, 159211, 183705, 193635, 220446, 244940, 258180, 318422, 367410, 387270, 440892, 477633, 551115, 636844, 734820, 774540, 796055, 955266, 1102230, 1432899, 1592110, 1910532, 2204460, 2388165, 2865798, 3184220, 4776330, 5731596, 7164495, 9552660, 14328990, 28657980]

約数ペア:

[(1, 28657980), (2, 14328990), (3, 9552660), (4, 7164495), (5, 5731596), (6, 4776330), (9, 3184220), (10, 2865798), (12, 2388165), (13, 2204460), (15, 1910532), (18, 1592110), (20, 1432899), (26, 1102230), (30, 955266), (36, 796055), (37, 774540), (39, 734820), (45, 636844), (52, 551115), (60, 477633), (65, 440892), (74, 387270), (78, 367410), (90, 318422), (111, 258180), (117, 244940), (130, 220446), (148, 193635), (156, 183705), (180, 159211), (185, 154908), (195, 146964), (222, 129090), (234, 122470), (260, 110223), (331, 86580), (333, 86060), (370, 77454), (390, 73482), (444, 64545), (468, 61235), (481, 59580), (555, 51636), (585, 48988), (662, 43290), (666, 43030), (740, 38727), (780, 36741), (962, 29790), (993, 28860), (1110, 25818), (1170, 24494), (1324, 21645), (1332, 21515), (1443, 19860), (1655, 17316), (1665, 17212), (1924, 14895), (1986, 14430), (2220, 12909), (2340, 12247), (2405, 11916), (2886, 9930), (2979, 9620), (3310, 8658), (3330, 8606), (3972, 7215), (4303, 6660), (4329, 6620), (4810, 5958), (4965, 5772)]