21390460

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:132

約数の個数: 144

約数和(自身を含む): 59524416

約数和(自身を除く): 38133956

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 23, 26, 28, 35, 46, 49, 52, 65, 70, 73, 91, 92, 98, 115, 130, 140, 146, 161, 182, 196, 230, 245, 260, 292, 299, 322, 364, 365, 455, 460, 490, 511, 598, 637, 644, 730, 805, 910, 949, 980, 1022, 1127, 1196, 1274, 1460, 1495, 1610, 1679, 1820, 1898, 2044, 2093, 2254, 2548, 2555, 2990, 3185, 3220, 3358, 3577, 3796, 4186, 4508, 4745, 5110, 5635, 5980, 6370, 6643, 6716, 7154, 8372, 8395, 9490, 10220, 10465, 11270, 11753, 12740, 13286, 14308, 14651, 16790, 17885, 18980, 20930, 21827, 22540, 23506, 26572, 29302, 33215, 33580, 35770, 41860, 43654, 46501, 47012, 58604, 58765, 66430, 71540, 73255, 82271, 87308, 93002, 109135, 117530, 132860, 146510, 152789, 164542, 186004, 218270, 232505, 235060, 293020, 305578, 329084, 411355, 436540, 465010, 611156, 763945, 822710, 930020, 1069523, 1527890, 1645420, 2139046, 3055780, 4278092, 5347615, 10695230, 21390460]

約数ペア:

[(1, 21390460), (2, 10695230), (4, 5347615), (5, 4278092), (7, 3055780), (10, 2139046), (13, 1645420), (14, 1527890), (20, 1069523), (23, 930020), (26, 822710), (28, 763945), (35, 611156), (46, 465010), (49, 436540), (52, 411355), (65, 329084), (70, 305578), (73, 293020), (91, 235060), (92, 232505), (98, 218270), (115, 186004), (130, 164542), (140, 152789), (146, 146510), (161, 132860), (182, 117530), (196, 109135), (230, 93002), (245, 87308), (260, 82271), (292, 73255), (299, 71540), (322, 66430), (364, 58765), (365, 58604), (455, 47012), (460, 46501), (490, 43654), (511, 41860), (598, 35770), (637, 33580), (644, 33215), (730, 29302), (805, 26572), (910, 23506), (949, 22540), (980, 21827), (1022, 20930), (1127, 18980), (1196, 17885), (1274, 16790), (1460, 14651), (1495, 14308), (1610, 13286), (1679, 12740), (1820, 11753), (1898, 11270), (2044, 10465), (2093, 10220), (2254, 9490), (2548, 8395), (2555, 8372), (2990, 7154), (3185, 6716), (3220, 6643), (3358, 6370), (3577, 5980), (3796, 5635), (4186, 5110), (4508, 4745)]