21398640

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{163}}^1\times {\mathrm{547}}^1$

素因数の和:726

約数の個数: 80

約数和(自身を含む): 66864768

約数和(自身を除く): 45466128

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 163, 240, 326, 489, 547, 652, 815, 978, 1094, 1304, 1630, 1641, 1956, 2188, 2445, 2608, 2735, 3260, 3282, 3912, 4376, 4890, 5470, 6520, 6564, 7824, 8205, 8752, 9780, 10940, 13040, 13128, 16410, 19560, 21880, 26256, 32820, 39120, 43760, 65640, 89161, 131280, 178322, 267483, 356644, 445805, 534966, 713288, 891610, 1069932, 1337415, 1426576, 1783220, 2139864, 2674830, 3566440, 4279728, 5349660, 7132880, 10699320, 21398640]

約数ペア:

[(1, 21398640), (2, 10699320), (3, 7132880), (4, 5349660), (5, 4279728), (6, 3566440), (8, 2674830), (10, 2139864), (12, 1783220), (15, 1426576), (16, 1337415), (20, 1069932), (24, 891610), (30, 713288), (40, 534966), (48, 445805), (60, 356644), (80, 267483), (120, 178322), (163, 131280), (240, 89161), (326, 65640), (489, 43760), (547, 39120), (652, 32820), (815, 26256), (978, 21880), (1094, 19560), (1304, 16410), (1630, 13128), (1641, 13040), (1956, 10940), (2188, 9780), (2445, 8752), (2608, 8205), (2735, 7824), (3260, 6564), (3282, 6520), (3912, 5470), (4376, 4890)]