20996820

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{997}}^1$

素因数の和:1031

約数の個数: 120

約数和(自身を含む): 71005704

約数和(自身を除く): 50008884

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 27, 30, 36, 39, 45, 52, 54, 60, 65, 78, 81, 90, 108, 117, 130, 135, 156, 162, 180, 195, 234, 260, 270, 324, 351, 390, 405, 468, 540, 585, 702, 780, 810, 997, 1053, 1170, 1404, 1620, 1755, 1994, 2106, 2340, 2991, 3510, 3988, 4212, 4985, 5265, 5982, 7020, 8973, 9970, 10530, 11964, 12961, 14955, 17946, 19940, 21060, 25922, 26919, 29910, 35892, 38883, 44865, 51844, 53838, 59820, 64805, 77766, 80757, 89730, 107676, 116649, 129610, 134595, 155532, 161514, 179460, 194415, 233298, 259220, 269190, 323028, 349947, 388830, 403785, 466596, 538380, 583245, 699894, 777660, 807570, 1049841, 1166490, 1399788, 1615140, 1749735, 2099682, 2332980, 3499470, 4199364, 5249205, 6998940, 10498410, 20996820]

約数ペア:

[(1, 20996820), (2, 10498410), (3, 6998940), (4, 5249205), (5, 4199364), (6, 3499470), (9, 2332980), (10, 2099682), (12, 1749735), (13, 1615140), (15, 1399788), (18, 1166490), (20, 1049841), (26, 807570), (27, 777660), (30, 699894), (36, 583245), (39, 538380), (45, 466596), (52, 403785), (54, 388830), (60, 349947), (65, 323028), (78, 269190), (81, 259220), (90, 233298), (108, 194415), (117, 179460), (130, 161514), (135, 155532), (156, 134595), (162, 129610), (180, 116649), (195, 107676), (234, 89730), (260, 80757), (270, 77766), (324, 64805), (351, 59820), (390, 53838), (405, 51844), (468, 44865), (540, 38883), (585, 35892), (702, 29910), (780, 26919), (810, 25922), (997, 21060), (1053, 19940), (1170, 17946), (1404, 14955), (1620, 12961), (1755, 11964), (1994, 10530), (2106, 9970), (2340, 8973), (2991, 7020), (3510, 5982), (3988, 5265), (4212, 4985)]