21234020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{173}}^1$

素因数の和:237

約数の個数: 72

約数和(自身を含む): 50118264

約数和(自身を除く): 28884244

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 68, 76, 85, 95, 170, 173, 190, 323, 340, 346, 361, 380, 646, 692, 722, 865, 1292, 1444, 1615, 1730, 1805, 2941, 3230, 3287, 3460, 3610, 5882, 6137, 6460, 6574, 7220, 11764, 12274, 13148, 14705, 16435, 24548, 29410, 30685, 32870, 55879, 58820, 61370, 62453, 65740, 111758, 122740, 124906, 223516, 249812, 279395, 312265, 558790, 624530, 1061701, 1117580, 1249060, 2123402, 4246804, 5308505, 10617010, 21234020]

約数ペア:

[(1, 21234020), (2, 10617010), (4, 5308505), (5, 4246804), (10, 2123402), (17, 1249060), (19, 1117580), (20, 1061701), (34, 624530), (38, 558790), (68, 312265), (76, 279395), (85, 249812), (95, 223516), (170, 124906), (173, 122740), (190, 111758), (323, 65740), (340, 62453), (346, 61370), (361, 58820), (380, 55879), (646, 32870), (692, 30685), (722, 29410), (865, 24548), (1292, 16435), (1444, 14705), (1615, 13148), (1730, 12274), (1805, 11764), (2941, 7220), (3230, 6574), (3287, 6460), (3460, 6137), (3610, 5882)]