28212860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{491}}^1$

素因数の和:543

約数の個数: 72

約数和(自身を含む): 68067216

約数和(自身を除く): 39854356

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 169, 170, 221, 260, 338, 340, 442, 491, 676, 845, 884, 982, 1105, 1690, 1964, 2210, 2455, 2873, 3380, 4420, 4910, 5746, 6383, 8347, 9820, 11492, 12766, 14365, 16694, 25532, 28730, 31915, 33388, 41735, 57460, 63830, 82979, 83470, 108511, 127660, 165958, 166940, 217022, 331916, 414895, 434044, 542555, 829790, 1085110, 1410643, 1659580, 2170220, 2821286, 5642572, 7053215, 14106430, 28212860]

約数ペア:

[(1, 28212860), (2, 14106430), (4, 7053215), (5, 5642572), (10, 2821286), (13, 2170220), (17, 1659580), (20, 1410643), (26, 1085110), (34, 829790), (52, 542555), (65, 434044), (68, 414895), (85, 331916), (130, 217022), (169, 166940), (170, 165958), (221, 127660), (260, 108511), (338, 83470), (340, 82979), (442, 63830), (491, 57460), (676, 41735), (845, 33388), (884, 31915), (982, 28730), (1105, 25532), (1690, 16694), (1964, 14365), (2210, 12766), (2455, 11492), (2873, 9820), (3380, 8347), (4420, 6383), (4910, 5746)]