21461820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{397}}^1$

素因数の和:479

約数の個数: 96

約数和(自身を含む): 64991808

約数和(自身を除く): 43529988

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 53, 60, 68, 85, 102, 106, 159, 170, 204, 212, 255, 265, 318, 340, 397, 510, 530, 636, 794, 795, 901, 1020, 1060, 1191, 1588, 1590, 1802, 1985, 2382, 2703, 3180, 3604, 3970, 4505, 4764, 5406, 5955, 6749, 7940, 9010, 10812, 11910, 13498, 13515, 18020, 20247, 21041, 23820, 26996, 27030, 33745, 40494, 42082, 54060, 63123, 67490, 80988, 84164, 101235, 105205, 126246, 134980, 202470, 210410, 252492, 315615, 357697, 404940, 420820, 631230, 715394, 1073091, 1262460, 1430788, 1788485, 2146182, 3576970, 4292364, 5365455, 7153940, 10730910, 21461820]

約数ペア:

[(1, 21461820), (2, 10730910), (3, 7153940), (4, 5365455), (5, 4292364), (6, 3576970), (10, 2146182), (12, 1788485), (15, 1430788), (17, 1262460), (20, 1073091), (30, 715394), (34, 631230), (51, 420820), (53, 404940), (60, 357697), (68, 315615), (85, 252492), (102, 210410), (106, 202470), (159, 134980), (170, 126246), (204, 105205), (212, 101235), (255, 84164), (265, 80988), (318, 67490), (340, 63123), (397, 54060), (510, 42082), (530, 40494), (636, 33745), (794, 27030), (795, 26996), (901, 23820), (1020, 21041), (1060, 20247), (1191, 18020), (1588, 13515), (1590, 13498), (1802, 11910), (1985, 10812), (2382, 9010), (2703, 7940), (3180, 6749), (3604, 5955), (3970, 5406), (4505, 4764)]