18720390

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{2087}}^1$

素因数の和:2133

約数の個数: 64

約数和(自身を含む): 50512896

約数和(自身を除く): 31792506

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 23, 26, 30, 39, 46, 65, 69, 78, 115, 130, 138, 195, 230, 299, 345, 390, 598, 690, 897, 1495, 1794, 2087, 2990, 4174, 4485, 6261, 8970, 10435, 12522, 20870, 27131, 31305, 48001, 54262, 62610, 81393, 96002, 135655, 144003, 162786, 240005, 271310, 288006, 406965, 480010, 624013, 720015, 813930, 1248026, 1440030, 1872039, 3120065, 3744078, 6240130, 9360195, 18720390]

約数ペア:

[(1, 18720390), (2, 9360195), (3, 6240130), (5, 3744078), (6, 3120065), (10, 1872039), (13, 1440030), (15, 1248026), (23, 813930), (26, 720015), (30, 624013), (39, 480010), (46, 406965), (65, 288006), (69, 271310), (78, 240005), (115, 162786), (130, 144003), (138, 135655), (195, 96002), (230, 81393), (299, 62610), (345, 54262), (390, 48001), (598, 31305), (690, 27131), (897, 20870), (1495, 12522), (1794, 10435), (2087, 8970), (2990, 6261), (4174, 4485)]