21387700

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{547}}^1$

素因数の和:601

約数の個数: 72

約数和(自身を含む): 51371712

約数和(自身を除く): 29984012

約数列:

[1, 2, 4, 5, 10, 17, 20, 23, 25, 34, 46, 50, 68, 85, 92, 100, 115, 170, 230, 340, 391, 425, 460, 547, 575, 782, 850, 1094, 1150, 1564, 1700, 1955, 2188, 2300, 2735, 3910, 5470, 7820, 9299, 9775, 10940, 12581, 13675, 18598, 19550, 25162, 27350, 37196, 39100, 46495, 50324, 54700, 62905, 92990, 125810, 185980, 213877, 232475, 251620, 314525, 427754, 464950, 629050, 855508, 929900, 1069385, 1258100, 2138770, 4277540, 5346925, 10693850, 21387700]

約数ペア:

[(1, 21387700), (2, 10693850), (4, 5346925), (5, 4277540), (10, 2138770), (17, 1258100), (20, 1069385), (23, 929900), (25, 855508), (34, 629050), (46, 464950), (50, 427754), (68, 314525), (85, 251620), (92, 232475), (100, 213877), (115, 185980), (170, 125810), (230, 92990), (340, 62905), (391, 54700), (425, 50324), (460, 46495), (547, 39100), (575, 37196), (782, 27350), (850, 25162), (1094, 19550), (1150, 18598), (1564, 13675), (1700, 12581), (1955, 10940), (2188, 9775), (2300, 9299), (2735, 7820), (3910, 5470)]