20613520

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{659}}^1$

素因数の和:712

約数の個数: 80

約数和(自身を含む): 53032320

約数和(自身を除く): 32418800

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 23, 34, 40, 46, 68, 80, 85, 92, 115, 136, 170, 184, 230, 272, 340, 368, 391, 460, 659, 680, 782, 920, 1318, 1360, 1564, 1840, 1955, 2636, 3128, 3295, 3910, 5272, 6256, 6590, 7820, 10544, 11203, 13180, 15157, 15640, 22406, 26360, 30314, 31280, 44812, 52720, 56015, 60628, 75785, 89624, 112030, 121256, 151570, 179248, 224060, 242512, 257669, 303140, 448120, 515338, 606280, 896240, 1030676, 1212560, 1288345, 2061352, 2576690, 4122704, 5153380, 10306760, 20613520]

約数ペア:

[(1, 20613520), (2, 10306760), (4, 5153380), (5, 4122704), (8, 2576690), (10, 2061352), (16, 1288345), (17, 1212560), (20, 1030676), (23, 896240), (34, 606280), (40, 515338), (46, 448120), (68, 303140), (80, 257669), (85, 242512), (92, 224060), (115, 179248), (136, 151570), (170, 121256), (184, 112030), (230, 89624), (272, 75785), (340, 60628), (368, 56015), (391, 52720), (460, 44812), (659, 31280), (680, 30314), (782, 26360), (920, 22406), (1318, 15640), (1360, 15157), (1564, 13180), (1840, 11203), (1955, 10544), (2636, 7820), (3128, 6590), (3295, 6256), (3910, 5272)]