81315180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2141}}^1$

素因数の和:2367

約数の個数: 72

約数和(自身を含む): 247940784

約数和(自身を除く): 166625604

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 211, 422, 633, 844, 1055, 1266, 1899, 2110, 2141, 2532, 3165, 3798, 4220, 4282, 6330, 6423, 7596, 8564, 9495, 10705, 12660, 12846, 18990, 19269, 21410, 25692, 32115, 37980, 38538, 42820, 64230, 77076, 96345, 128460, 192690, 385380, 451751, 903502, 1355253, 1807004, 2258755, 2710506, 4065759, 4517510, 5421012, 6776265, 8131518, 9035020, 13552530, 16263036, 20328795, 27105060, 40657590, 81315180]

約数ペア:

[(1, 81315180), (2, 40657590), (3, 27105060), (4, 20328795), (5, 16263036), (6, 13552530), (9, 9035020), (10, 8131518), (12, 6776265), (15, 5421012), (18, 4517510), (20, 4065759), (30, 2710506), (36, 2258755), (45, 1807004), (60, 1355253), (90, 903502), (180, 451751), (211, 385380), (422, 192690), (633, 128460), (844, 96345), (1055, 77076), (1266, 64230), (1899, 42820), (2110, 38538), (2141, 37980), (2532, 32115), (3165, 25692), (3798, 21410), (4220, 19269), (4282, 18990), (6330, 12846), (6423, 12660), (7596, 10705), (8564, 9495)]