20894085

素因数分解:

$3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:187

約数の個数: 64

約数和(自身を含む): 39398400

約数和(自身を除く): 18504315

約数列:

[1, 3, 5, 9, 15, 27, 37, 45, 47, 89, 111, 135, 141, 185, 235, 267, 333, 423, 445, 555, 705, 801, 999, 1269, 1335, 1665, 1739, 2115, 2403, 3293, 4005, 4183, 4995, 5217, 6345, 8695, 9879, 12015, 12549, 15651, 16465, 20915, 26085, 29637, 37647, 46953, 49395, 62745, 78255, 88911, 112941, 148185, 154771, 188235, 234765, 444555, 464313, 564705, 773855, 1392939, 2321565, 4178817, 6964695, 20894085]

約数ペア:

[(1, 20894085), (3, 6964695), (5, 4178817), (9, 2321565), (15, 1392939), (27, 773855), (37, 564705), (45, 464313), (47, 444555), (89, 234765), (111, 188235), (135, 154771), (141, 148185), (185, 112941), (235, 88911), (267, 78255), (333, 62745), (423, 49395), (445, 46953), (555, 37647), (705, 29637), (801, 26085), (999, 20915), (1269, 16465), (1335, 15651), (1665, 12549), (1739, 12015), (2115, 9879), (2403, 8695), (3293, 6345), (4005, 5217), (4183, 4995)]