19886940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:196

約数の個数: 144

約数和(自身を含む): 65493792

約数和(自身を除く): 45606852

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 67, 68, 85, 90, 97, 102, 134, 153, 170, 180, 194, 201, 204, 255, 268, 291, 306, 335, 340, 388, 402, 485, 510, 582, 603, 612, 670, 765, 804, 873, 970, 1005, 1020, 1139, 1164, 1206, 1340, 1455, 1530, 1649, 1746, 1940, 2010, 2278, 2412, 2910, 3015, 3060, 3298, 3417, 3492, 4020, 4365, 4556, 4947, 5695, 5820, 6030, 6499, 6596, 6834, 8245, 8730, 9894, 10251, 11390, 12060, 12998, 13668, 14841, 16490, 17085, 17460, 19497, 19788, 20502, 22780, 24735, 25996, 29682, 32495, 32980, 34170, 38994, 41004, 49470, 51255, 58491, 59364, 64990, 68340, 74205, 77988, 97485, 98940, 102510, 110483, 116982, 129980, 148410, 194970, 205020, 220966, 233964, 292455, 296820, 331449, 389940, 441932, 552415, 584910, 662898, 994347, 1104830, 1169820, 1325796, 1657245, 1988694, 2209660, 3314490, 3977388, 4971735, 6628980, 9943470, 19886940]

約数ペア:

[(1, 19886940), (2, 9943470), (3, 6628980), (4, 4971735), (5, 3977388), (6, 3314490), (9, 2209660), (10, 1988694), (12, 1657245), (15, 1325796), (17, 1169820), (18, 1104830), (20, 994347), (30, 662898), (34, 584910), (36, 552415), (45, 441932), (51, 389940), (60, 331449), (67, 296820), (68, 292455), (85, 233964), (90, 220966), (97, 205020), (102, 194970), (134, 148410), (153, 129980), (170, 116982), (180, 110483), (194, 102510), (201, 98940), (204, 97485), (255, 77988), (268, 74205), (291, 68340), (306, 64990), (335, 59364), (340, 58491), (388, 51255), (402, 49470), (485, 41004), (510, 38994), (582, 34170), (603, 32980), (612, 32495), (670, 29682), (765, 25996), (804, 24735), (873, 22780), (970, 20502), (1005, 19788), (1020, 19497), (1139, 17460), (1164, 17085), (1206, 16490), (1340, 14841), (1455, 13668), (1530, 12998), (1649, 12060), (1746, 11390), (1940, 10251), (2010, 9894), (2278, 8730), (2412, 8245), (2910, 6834), (3015, 6596), (3060, 6499), (3298, 6030), (3417, 5820), (3492, 5695), (4020, 4947), (4365, 4556)]