81151960

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{421}}^1$

素因数の和:572

約数の個数: 64

約数和(自身を含む): 188380800

約数和(自身を除く): 107228840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 79, 122, 158, 244, 305, 316, 395, 421, 488, 610, 632, 790, 842, 1220, 1580, 1684, 2105, 2440, 3160, 3368, 4210, 4819, 8420, 9638, 16840, 19276, 24095, 25681, 33259, 38552, 48190, 51362, 66518, 96380, 102724, 128405, 133036, 166295, 192760, 205448, 256810, 266072, 332590, 513620, 665180, 1027240, 1330360, 2028799, 4057598, 8115196, 10143995, 16230392, 20287990, 40575980, 81151960]

約数ペア:

[(1, 81151960), (2, 40575980), (4, 20287990), (5, 16230392), (8, 10143995), (10, 8115196), (20, 4057598), (40, 2028799), (61, 1330360), (79, 1027240), (122, 665180), (158, 513620), (244, 332590), (305, 266072), (316, 256810), (395, 205448), (421, 192760), (488, 166295), (610, 133036), (632, 128405), (790, 102724), (842, 96380), (1220, 66518), (1580, 51362), (1684, 48190), (2105, 38552), (2440, 33259), (3160, 25681), (3368, 24095), (4210, 19276), (4819, 16840), (8420, 9638)]