21130165040

素因数分解:

$2^4\times 5^1\times {\mathrm{16231}}^1\times {\mathrm{16273}}^1$

素因数の和:32517

約数の個数: 40

約数和(自身を含む): 49133679648

約数和(自身を除く): 28003514608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 16231, 16273, 32462, 32546, 64924, 65092, 81155, 81365, 129848, 130184, 162310, 162730, 259696, 260368, 324620, 325460, 649240, 650920, 1298480, 1301840, 264127063, 528254126, 1056508252, 1320635315, 2113016504, 2641270630, 4226033008, 5282541260, 10565082520, 21130165040]

約数ペア:

[(1, 21130165040), (2, 10565082520), (4, 5282541260), (5, 4226033008), (8, 2641270630), (10, 2113016504), (16, 1320635315), (20, 1056508252), (40, 528254126), (80, 264127063), (16231, 1301840), (16273, 1298480), (32462, 650920), (32546, 649240), (64924, 325460), (65092, 324620), (81155, 260368), (81365, 259696), (129848, 162730), (130184, 162310)]