21787980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{5953}}^1$

素因数の和:6026

約数の個数: 48

約数和(自身を含む): 62016864

約数和(自身を除く): 40228884

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 61, 122, 183, 244, 305, 366, 610, 732, 915, 1220, 1830, 3660, 5953, 11906, 17859, 23812, 29765, 35718, 59530, 71436, 89295, 119060, 178590, 357180, 363133, 726266, 1089399, 1452532, 1815665, 2178798, 3631330, 4357596, 5446995, 7262660, 10893990, 21787980]

約数ペア:

[(1, 21787980), (2, 10893990), (3, 7262660), (4, 5446995), (5, 4357596), (6, 3631330), (10, 2178798), (12, 1815665), (15, 1452532), (20, 1089399), (30, 726266), (60, 363133), (61, 357180), (122, 178590), (183, 119060), (244, 89295), (305, 71436), (366, 59530), (610, 35718), (732, 29765), (915, 23812), (1220, 17859), (1830, 11906), (3660, 5953)]