21980910

素因数分解:

$2^1\times 3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{787}}^1$

素因数の和:830

約数の個数: 96

約数和(自身を含む): 64679040

約数和(自身を除く): 42698130

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 19, 21, 30, 35, 38, 42, 49, 57, 70, 95, 98, 105, 114, 133, 147, 190, 210, 245, 266, 285, 294, 399, 490, 570, 665, 735, 787, 798, 931, 1330, 1470, 1574, 1862, 1995, 2361, 2793, 3935, 3990, 4655, 4722, 5509, 5586, 7870, 9310, 11018, 11805, 13965, 14953, 16527, 23610, 27545, 27930, 29906, 33054, 38563, 44859, 55090, 74765, 77126, 82635, 89718, 104671, 115689, 149530, 165270, 192815, 209342, 224295, 231378, 314013, 385630, 448590, 523355, 578445, 628026, 732697, 1046710, 1156890, 1465394, 1570065, 2198091, 3140130, 3663485, 4396182, 7326970, 10990455, 21980910]

約数ペア:

[(1, 21980910), (2, 10990455), (3, 7326970), (5, 4396182), (6, 3663485), (7, 3140130), (10, 2198091), (14, 1570065), (15, 1465394), (19, 1156890), (21, 1046710), (30, 732697), (35, 628026), (38, 578445), (42, 523355), (49, 448590), (57, 385630), (70, 314013), (95, 231378), (98, 224295), (105, 209342), (114, 192815), (133, 165270), (147, 149530), (190, 115689), (210, 104671), (245, 89718), (266, 82635), (285, 77126), (294, 74765), (399, 55090), (490, 44859), (570, 38563), (665, 33054), (735, 29906), (787, 27930), (798, 27545), (931, 23610), (1330, 16527), (1470, 14953), (1574, 13965), (1862, 11805), (1995, 11018), (2361, 9310), (2793, 7870), (3935, 5586), (3990, 5509), (4655, 4722)]