31499720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:259

約数の個数: 128

約数和(自身を含む): 88473600

約数和(自身を除く): 56973880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 31, 35, 38, 40, 56, 62, 70, 76, 95, 124, 133, 140, 152, 155, 190, 191, 217, 248, 266, 280, 310, 380, 382, 434, 532, 589, 620, 665, 760, 764, 868, 955, 1064, 1085, 1178, 1240, 1330, 1337, 1528, 1736, 1910, 2170, 2356, 2660, 2674, 2945, 3629, 3820, 4123, 4340, 4712, 5320, 5348, 5890, 5921, 6685, 7258, 7640, 8246, 8680, 10696, 11780, 11842, 13370, 14516, 16492, 18145, 20615, 23560, 23684, 25403, 26740, 29032, 29605, 32984, 36290, 41230, 41447, 47368, 50806, 53480, 59210, 72580, 82460, 82894, 101612, 112499, 118420, 127015, 145160, 164920, 165788, 203224, 207235, 224998, 236840, 254030, 331576, 414470, 449996, 508060, 562495, 787493, 828940, 899992, 1016120, 1124990, 1574986, 1657880, 2249980, 3149972, 3937465, 4499960, 6299944, 7874930, 15749860, 31499720]

約数ペア:

[(1, 31499720), (2, 15749860), (4, 7874930), (5, 6299944), (7, 4499960), (8, 3937465), (10, 3149972), (14, 2249980), (19, 1657880), (20, 1574986), (28, 1124990), (31, 1016120), (35, 899992), (38, 828940), (40, 787493), (56, 562495), (62, 508060), (70, 449996), (76, 414470), (95, 331576), (124, 254030), (133, 236840), (140, 224998), (152, 207235), (155, 203224), (190, 165788), (191, 164920), (217, 145160), (248, 127015), (266, 118420), (280, 112499), (310, 101612), (380, 82894), (382, 82460), (434, 72580), (532, 59210), (589, 53480), (620, 50806), (665, 47368), (760, 41447), (764, 41230), (868, 36290), (955, 32984), (1064, 29605), (1085, 29032), (1178, 26740), (1240, 25403), (1330, 23684), (1337, 23560), (1528, 20615), (1736, 18145), (1910, 16492), (2170, 14516), (2356, 13370), (2660, 11842), (2674, 11780), (2945, 10696), (3629, 8680), (3820, 8246), (4123, 7640), (4340, 7258), (4712, 6685), (5320, 5921), (5348, 5890)]