20528940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:223

約数の個数: 96

約数和(自身を含む): 59996160

約数和(自身を除く): 39467220

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 61, 71, 79, 122, 142, 158, 183, 213, 237, 244, 284, 305, 316, 355, 366, 395, 426, 474, 610, 710, 732, 790, 852, 915, 948, 1065, 1185, 1220, 1420, 1580, 1830, 2130, 2370, 3660, 4260, 4331, 4740, 4819, 5609, 8662, 9638, 11218, 12993, 14457, 16827, 17324, 19276, 21655, 22436, 24095, 25986, 28045, 28914, 33654, 43310, 48190, 51972, 56090, 57828, 64965, 67308, 72285, 84135, 86620, 96380, 112180, 129930, 144570, 168270, 259860, 289140, 336540, 342149, 684298, 1026447, 1368596, 1710745, 2052894, 3421490, 4105788, 5132235, 6842980, 10264470, 20528940]

約数ペア:

[(1, 20528940), (2, 10264470), (3, 6842980), (4, 5132235), (5, 4105788), (6, 3421490), (10, 2052894), (12, 1710745), (15, 1368596), (20, 1026447), (30, 684298), (60, 342149), (61, 336540), (71, 289140), (79, 259860), (122, 168270), (142, 144570), (158, 129930), (183, 112180), (213, 96380), (237, 86620), (244, 84135), (284, 72285), (305, 67308), (316, 64965), (355, 57828), (366, 56090), (395, 51972), (426, 48190), (474, 43310), (610, 33654), (710, 28914), (732, 28045), (790, 25986), (852, 24095), (915, 22436), (948, 21655), (1065, 19276), (1185, 17324), (1220, 16827), (1420, 14457), (1580, 12993), (1830, 11218), (2130, 9638), (2370, 8662), (3660, 5609), (4260, 4819), (4331, 4740)]