21152565

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 43695288

約数和(自身を除く): 22542723

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 53, 63, 105, 147, 159, 181, 245, 265, 315, 371, 441, 477, 543, 735, 795, 905, 1113, 1267, 1629, 1855, 2205, 2385, 2597, 2715, 3339, 3801, 5565, 6335, 7791, 8145, 8869, 9593, 11403, 12985, 16695, 19005, 23373, 26607, 28779, 38955, 44345, 47965, 57015, 67151, 79821, 86337, 116865, 133035, 143895, 201453, 335755, 399105, 431685, 470057, 604359, 1007265, 1410171, 2350285, 3021795, 4230513, 7050855, 21152565]

約数ペア:

[(1, 21152565), (3, 7050855), (5, 4230513), (7, 3021795), (9, 2350285), (15, 1410171), (21, 1007265), (35, 604359), (45, 470057), (49, 431685), (53, 399105), (63, 335755), (105, 201453), (147, 143895), (159, 133035), (181, 116865), (245, 86337), (265, 79821), (315, 67151), (371, 57015), (441, 47965), (477, 44345), (543, 38955), (735, 28779), (795, 26607), (905, 23373), (1113, 19005), (1267, 16695), (1629, 12985), (1855, 11403), (2205, 9593), (2385, 8869), (2597, 8145), (2715, 7791), (3339, 6335), (3801, 5565)]