81355780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:281

約数の個数: 96

約数和(自身を含む): 196116480

約数和(自身を除く): 114760700

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 79, 110, 124, 151, 155, 158, 220, 302, 310, 316, 341, 395, 604, 620, 682, 755, 790, 869, 1364, 1510, 1580, 1661, 1705, 1738, 2449, 3020, 3322, 3410, 3476, 4345, 4681, 4898, 6644, 6820, 8305, 8690, 9362, 9796, 11929, 12245, 16610, 17380, 18724, 23405, 23858, 24490, 26939, 33220, 46810, 47716, 48980, 51491, 53878, 59645, 93620, 102982, 107756, 119290, 131219, 134695, 205964, 238580, 257455, 262438, 269390, 369799, 514910, 524876, 538780, 656095, 739598, 1029820, 1312190, 1479196, 1848995, 2624380, 3697990, 4067789, 7395980, 8135578, 16271156, 20338945, 40677890, 81355780]

約数ペア:

[(1, 81355780), (2, 40677890), (4, 20338945), (5, 16271156), (10, 8135578), (11, 7395980), (20, 4067789), (22, 3697990), (31, 2624380), (44, 1848995), (55, 1479196), (62, 1312190), (79, 1029820), (110, 739598), (124, 656095), (151, 538780), (155, 524876), (158, 514910), (220, 369799), (302, 269390), (310, 262438), (316, 257455), (341, 238580), (395, 205964), (604, 134695), (620, 131219), (682, 119290), (755, 107756), (790, 102982), (869, 93620), (1364, 59645), (1510, 53878), (1580, 51491), (1661, 48980), (1705, 47716), (1738, 46810), (2449, 33220), (3020, 26939), (3322, 24490), (3410, 23858), (3476, 23405), (4345, 18724), (4681, 17380), (4898, 16610), (6644, 12245), (6820, 11929), (8305, 9796), (8690, 9362)]