21490970

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:167

約数の個数: 64

約数和(自身を含む): 43110144

約数和(自身を除く): 21619174

約数列:

[1, 2, 5, 10, 23, 41, 43, 46, 53, 82, 86, 106, 115, 205, 215, 230, 265, 410, 430, 530, 943, 989, 1219, 1763, 1886, 1978, 2173, 2279, 2438, 3526, 4346, 4558, 4715, 4945, 6095, 8815, 9430, 9890, 10865, 11395, 12190, 17630, 21730, 22790, 40549, 49979, 52417, 81098, 93439, 99958, 104834, 186878, 202745, 249895, 262085, 405490, 467195, 499790, 524170, 934390, 2149097, 4298194, 10745485, 21490970]

約数ペア:

[(1, 21490970), (2, 10745485), (5, 4298194), (10, 2149097), (23, 934390), (41, 524170), (43, 499790), (46, 467195), (53, 405490), (82, 262085), (86, 249895), (106, 202745), (115, 186878), (205, 104834), (215, 99958), (230, 93439), (265, 81098), (410, 52417), (430, 49979), (530, 40549), (943, 22790), (989, 21730), (1219, 17630), (1763, 12190), (1886, 11395), (1978, 10865), (2173, 9890), (2279, 9430), (2438, 8815), (3526, 6095), (4346, 4945), (4558, 4715)]