21989500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{199}}^1$

素因数の和:248

約数の個数: 96

約数和(自身を含む): 55036800

約数和(自身を除く): 33047300

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 25, 26, 34, 50, 52, 65, 68, 85, 100, 125, 130, 170, 199, 221, 250, 260, 325, 340, 398, 425, 442, 500, 650, 796, 850, 884, 995, 1105, 1300, 1625, 1700, 1990, 2125, 2210, 2587, 3250, 3383, 3980, 4250, 4420, 4975, 5174, 5525, 6500, 6766, 8500, 9950, 10348, 11050, 12935, 13532, 16915, 19900, 22100, 24875, 25870, 27625, 33830, 43979, 49750, 51740, 55250, 64675, 67660, 84575, 87958, 99500, 110500, 129350, 169150, 175916, 219895, 258700, 323375, 338300, 422875, 439790, 646750, 845750, 879580, 1099475, 1293500, 1691500, 2198950, 4397900, 5497375, 10994750, 21989500]

約数ペア:

[(1, 21989500), (2, 10994750), (4, 5497375), (5, 4397900), (10, 2198950), (13, 1691500), (17, 1293500), (20, 1099475), (25, 879580), (26, 845750), (34, 646750), (50, 439790), (52, 422875), (65, 338300), (68, 323375), (85, 258700), (100, 219895), (125, 175916), (130, 169150), (170, 129350), (199, 110500), (221, 99500), (250, 87958), (260, 84575), (325, 67660), (340, 64675), (398, 55250), (425, 51740), (442, 49750), (500, 43979), (650, 33830), (796, 27625), (850, 25870), (884, 24875), (995, 22100), (1105, 19900), (1300, 16915), (1625, 13532), (1700, 12935), (1990, 11050), (2125, 10348), (2210, 9950), (2587, 8500), (3250, 6766), (3383, 6500), (3980, 5525), (4250, 5174), (4420, 4975)]