15880020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20359}}^1$

素因数の和:20384

約数の個数: 48

約数和(自身を含む): 47886720

約数和(自身を除く): 32006700

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 20359, 40718, 61077, 81436, 101795, 122154, 203590, 244308, 264667, 305385, 407180, 529334, 610770, 794001, 1058668, 1221540, 1323335, 1588002, 2646670, 3176004, 3970005, 5293340, 7940010, 15880020]

約数ペア:

[(1, 15880020), (2, 7940010), (3, 5293340), (4, 3970005), (5, 3176004), (6, 2646670), (10, 1588002), (12, 1323335), (13, 1221540), (15, 1058668), (20, 794001), (26, 610770), (30, 529334), (39, 407180), (52, 305385), (60, 264667), (65, 244308), (78, 203590), (130, 122154), (156, 101795), (195, 81436), (260, 61077), (390, 40718), (780, 20359)]