81899820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7459}}^1$

素因数の和:7535

約数の個数: 72

約数和(自身を含む): 252535920

約数和(自身を除く): 170636100

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 61, 90, 122, 180, 183, 244, 305, 366, 549, 610, 732, 915, 1098, 1220, 1830, 2196, 2745, 3660, 5490, 7459, 10980, 14918, 22377, 29836, 37295, 44754, 67131, 74590, 89508, 111885, 134262, 149180, 223770, 268524, 335655, 447540, 454999, 671310, 909998, 1342620, 1364997, 1819996, 2274995, 2729994, 4094991, 4549990, 5459988, 6824985, 8189982, 9099980, 13649970, 16379964, 20474955, 27299940, 40949910, 81899820]

約数ペア:

[(1, 81899820), (2, 40949910), (3, 27299940), (4, 20474955), (5, 16379964), (6, 13649970), (9, 9099980), (10, 8189982), (12, 6824985), (15, 5459988), (18, 4549990), (20, 4094991), (30, 2729994), (36, 2274995), (45, 1819996), (60, 1364997), (61, 1342620), (90, 909998), (122, 671310), (180, 454999), (183, 447540), (244, 335655), (305, 268524), (366, 223770), (549, 149180), (610, 134262), (732, 111885), (915, 89508), (1098, 74590), (1220, 67131), (1830, 44754), (2196, 37295), (2745, 29836), (3660, 22377), (5490, 14918), (7459, 10980)]