21000638915

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{4217}}^1$

素因数の和:4380

約数の個数: 48

約数和(自身を含む): 27769962240

約数和(自身を除く): 6769323325

約数列:

[1, 5, 19, 31, 89, 95, 155, 361, 445, 589, 1691, 1805, 2759, 2945, 4217, 8455, 11191, 13795, 21085, 32129, 52421, 55955, 80123, 130727, 160645, 262105, 375313, 400615, 653635, 995999, 1522337, 1876565, 2483813, 4979995, 7130947, 7611685, 11634703, 12419065, 35654735, 47192447, 58173515, 135487993, 221059357, 235962235, 677439965, 1105296785, 4200127783, 21000638915]

約数ペア:

[(1, 21000638915), (5, 4200127783), (19, 1105296785), (31, 677439965), (89, 235962235), (95, 221059357), (155, 135487993), (361, 58173515), (445, 47192447), (589, 35654735), (1691, 12419065), (1805, 11634703), (2759, 7611685), (2945, 7130947), (4217, 4979995), (8455, 2483813), (11191, 1876565), (13795, 1522337), (21085, 995999), (32129, 653635), (52421, 400615), (55955, 375313), (80123, 262105), (130727, 160645)]