21656419281

素因数分解:

$3^5\times 7^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1\times {\mathrm{1423}}^1$

素因数の和:1857

約数の個数: 96

約数和(自身を含む): 38812999680

約数和(自身を除く): 17156580399

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 81, 161, 189, 207, 243, 389, 483, 567, 621, 1167, 1423, 1449, 1701, 1863, 2723, 3501, 4269, 4347, 5589, 8169, 8947, 9961, 10503, 12807, 13041, 24507, 26841, 29883, 31509, 32729, 38421, 39123, 62629, 73521, 80523, 89649, 94527, 98187, 115263, 187887, 220563, 229103, 241569, 268947, 294561, 345789, 553547, 563661, 661689, 687309, 724707, 806841, 883683, 1660641, 1690983, 2061927, 2174121, 2420523, 2651049, 3874829, 4981923, 5072949, 6185781, 7953147, 11624487, 12731581, 14945769, 15218847, 18557343, 34873461, 38194743, 44837307, 55672029, 89121067, 104620383, 114584229, 134511921, 267363201, 313861149, 343752687, 802089603, 941583447, 1031258061, 2406268809, 3093774183, 7218806427, 21656419281]

約数ペア:

[(1, 21656419281), (3, 7218806427), (7, 3093774183), (9, 2406268809), (21, 1031258061), (23, 941583447), (27, 802089603), (63, 343752687), (69, 313861149), (81, 267363201), (161, 134511921), (189, 114584229), (207, 104620383), (243, 89121067), (389, 55672029), (483, 44837307), (567, 38194743), (621, 34873461), (1167, 18557343), (1423, 15218847), (1449, 14945769), (1701, 12731581), (1863, 11624487), (2723, 7953147), (3501, 6185781), (4269, 5072949), (4347, 4981923), (5589, 3874829), (8169, 2651049), (8947, 2420523), (9961, 2174121), (10503, 2061927), (12807, 1690983), (13041, 1660641), (24507, 883683), (26841, 806841), (29883, 724707), (31509, 687309), (32729, 661689), (38421, 563661), (39123, 553547), (62629, 345789), (73521, 294561), (80523, 268947), (89649, 241569), (94527, 229103), (98187, 220563), (115263, 187887)]